Global Volcanism Program | Volcanoes in the North America Volcanic Regions

Volcanoes in the North America Volcanic Regions

Additional information about the Volcanic Regions and a map display is currently under development.

There are 149 Holocene volcanoes in the North America Volcanic Regions.

Basin and Range Volcanic Province

Volcano Name	Country	Last Eruption	Volcanic Landform
Ubehebe Craters	United States	150 BCE	Minor
Markagunt Plateau	United States	1050 CE	Cluster
Black Rock Desert	United States	1290 CE	Cluster
Zuni-Bandera	United States	1170 BCE	Cluster
Dotsero	United States	2200 BCE	Minor (Basaltic)
Uinkaret Field	United States	1100 CE	Cluster
San Francisco Volcanic Field	United States	1075 CE	Cluster
Pinacate	Mexico	Unknown	Cluster
Red Hill-Quemado	United States	9450 BCE	Cluster
Mono Lake Volcanic Field	United States	1790 CE	Cluster
Mono-Inyo Craters	United States	1380 CE	Cluster
Mammoth Mountain	United States	1260 CE	Minor
Soda Lakes	United States	Unknown	Minor (Basaltic)
Durango Volcanic Field	Mexico	Unknown	Cluster
Carrizozo	United States	3250 BCE	Minor

Yellowstone-Snake River Hotspot Volcano Group

Volcano Name	Country	Last Eruption	Volcanic Landform
Black Butte Crater Lava Field	United States	8400 BCE	Shield
Craters of the Moon	United States	130 BCE	Cluster
Wapi Lava Field	United States	300 BCE	Shield
Hell's Half Acre	United States	3250 BCE	Shield

High Lava Plains Volcanic Province

Volcano Name	Country	Last Eruption	Volcanic Landform
Devils Garden	United States	Unknown	Cluster
Diamond Craters	United States	5610 BCE	Cluster
Jordan Craters	United States	1250 BCE	Cluster

California Coast Ranges Volcano Group

Volcano Name	Country	Last Eruption	Volcanic Landform
Clear Lake Volcanic Field	United States	Unknown	Cluster

High Cascades Volcanic Arc

Volcano Name	Country	Last Eruption	Volcanic Landform
Rainier	United States	1450 CE	Composite
Adams	United States	950 CE	Composite
St. Helens	United States	2008 CE	Composite
West Crater	United States	5750 BCE	Cluster
Indian Heaven	United States	6250 BCE	Cluster
Hood	United States	1866 CE	Composite
Jefferson	United States	950 CE	Composite
Blue Lake Crater	United States	680 CE	Minor (Basaltic)
Sand Mountain Field	United States	950 BCE	Cluster
Belknap	United States	475 CE	Shield
Three Sisters	United States	439 CE	Composite
Bachelor	United States	5800 BCE	Composite
Davis Lake	United States	2790 BCE	Cluster
Newberry	United States	690 CE	Shield
Cinnamon Butte	United States	Unknown	Minor (Basaltic)
Crater Lake	United States	2850 BCE	Caldera
Shasta	United States	1250 CE	Composite
Medicine Lake	United States	1060 CE	Shield
Lassen Volcanic Center	United States	1917 CE	Composite

Garibaldi Volcanic Arc

Volcano Name	Country	Last Eruption	Volcanic Landform
Silverthrone	Canada	Unknown	Composite
Bridge River Cones	Canada	Unknown	Cluster
Meager	Canada	410 BCE	Composite
Garibaldi Lake	Canada	Unknown	Cluster
Garibaldi	Canada	8060 BCE	Composite
Cayley Volcanic Field	Canada	Unknown	Cluster
Baker	United States	1880 CE	Composite
Glacier Peak	United States	1700 CE	Composite

Interior Western Canada Volcanic Province

Volcano Name	Country	Last Eruption	Volcanic Landform
Nazko	Canada	5220 BCE	Minor (Basaltic)
Wells Gray-Clearwater	Canada	1550 CE	Cluster

Queen Charlotte Volcano Group

Volcano Name	Country	Last Eruption	Volcanic Landform
Duncan Canal	United States	Unknown	Cluster
Tlevak Strait-Suemez Island	United States	Unknown	Cluster
Milbanke Sound Group	Canada	Unknown	Minor (Basaltic)
Edgecumbe	United States	2080 BCE	Cluster

Northern Cordilleran Volcanic Province

Volcano Name	Country	Last Eruption	Volcanic Landform
Fort Selkirk	Canada	Unknown	Cluster
Alligator Lake	Canada	Unknown	Cluster
Atlin Volcanic Field	Canada	Unknown	Cluster
Tuya Volcanic Field	Canada	Unknown	Cluster
Heart Peaks	Canada	Unknown	Shield
Level Mountain	Canada	Unknown	Shield
Edziza	Canada	950 CE	Composite
Spectrum Range	Canada	Unknown	Shield
Hoodoo Mountain	Canada	7050 BCE	Minor
Iskut-Unuk River Cones	Canada	1800 CE	Cluster
Tseax River Cone	Canada	1690 CE	Minor (Basaltic)
Behm Canal-Rudyerd Bay	United States	Unknown	Cluster
Crow Lagoon	Canada	Unknown	Minor

Northern Alaska-Bering Sea Volcanic Province

Volcano Name	Country	Last Eruption	Volcanic Landform
St. Paul Island	United States	1280 BCE	Shield
Ingakslugwat Hills	United States	Unknown	Cluster
St. Michael	United States	Unknown	Cluster
Imuruk Lake	United States	300 CE	Cluster

Wrangell Volcanic Arc

Volcano Name	Country	Last Eruption	Volcanic Landform
Wrangell	United States	1912 CE	Shield
Churchill	United States	847 CE	Composite

Alaska Peninsula Volcanic Arc

Volcano Name	Country	Last Eruption	Volcanic Landform
Buzzard Creek	United States	1050 BCE	Minor (Basaltic)
Augustine	United States	2006 CE	Composite
Iliamna	United States	1876 CE	Composite
Redoubt	United States	2009 CE	Composite
Spurr	United States	1992 CE	Composite
Hayes	United States	1200 CE	Composite
Black Peak	United States	1900 BCE	Composite
Aniakchak	United States	1931 CE	Caldera
Yantarni	United States	800 BCE	Composite
Chiginagak	United States	1998 CE	Composite
Kialagvik	United States	Unknown	Composite
Ugashik-Peulik	United States	1814 CE	Composite
Ukinrek Maars	United States	1977 CE	Minor (Basaltic)
Unnamed	United States	Unknown	Minor (Silicic)
Martin	United States	1953 CE	Composite
Mageik	United States	500 BCE	Composite
Trident	United States	1974 CE	Composite
Katmai	United States	1912 CE	Composite
Novarupta	United States	1912 CE	Caldera
Griggs	United States	1790 BCE	Composite
Snowy Mountain	United States	1710 CE	Composite
Denison	United States	Unknown	Composite
Steller	United States	Unknown	Composite
Kukak	United States	Unknown	Composite
Kaguyak	United States	3850 BCE	Caldera
Fourpeaked	United States	2006 CE	Composite
Douglas	United States	Unknown	Composite

Aleutian Ridge Volcanic Arc

Volcano Name	Country	Last Eruption	Volcanic Landform
Gareloi	United States	1989 CE	Composite
Tanaga	United States	1914 CE	Composite
Takawangha	United States	1550 CE	Composite
Bobrof	United States	Unknown	Composite
Kanaga	United States	2023 CE	Composite
Moffett	United States	1600 BCE	Composite
Great Sitkin	United States	2025 CE	Composite
Kasatochi	United States	2008 CE	Composite
Koniuji	United States	1150 BCE	Composite
Atka Volcanic Complex	United States	2025 CE	Composite
Vsevidof	United States	1878 CE	Composite
Recheschnoi	United States	Unknown	Composite
Okmok	United States	2008 CE	Shield
Bogoslof	United States	2017 CE	Composite
Makushin	United States	1995 CE	Composite
Akutan	United States	1992 CE	Composite
Westdahl	United States	1992 CE	Composite
Fisher	United States	1830 CE	Composite
Shishaldin	United States	2023 CE	Composite
Roundtop	United States	7600 BCE	Composite
Amak	United States	1796 CE	Composite
Frosty	United States	Unknown	Composite
Dutton	United States	Unknown	Composite
Emmons Lake Volcanic Center	United States	Unknown	Caldera
Pavlof	United States	2022 CE	Composite
Pavlof Sister	United States	Unknown	Composite
Dana	United States	1890 BCE	Composite
Stepovak Bay Group	United States	Unknown	Cluster
Kupreanof	United States	Unknown	Composite
Veniaminof	United States	2021 CE	Composite
Seguam	United States	1993 CE	Composite
Amukta	United States	1996 CE	Composite
Chagulak	United States	Unknown	Composite
Yunaska	United States	1937 CE	Shield
Herbert	United States	Unknown	Composite
Carlisle	United States	1828 CE	Composite
Cleveland	United States	2020 CE	Composite
Tana	United States	Unknown	Composite
Uliaga	United States	Unknown	Composite
Kagamil	United States	1929 CE	Composite
Piip	Russia	5050 BCE	Composite
Buldir	United States	Unknown	Composite
Kiska	United States	1990 CE	Composite
Segula	United States	Unknown	Composite
Davidof	United States	Unknown	Composite
Little Sitkin	United States	1830 CE	Composite
Semisopochnoi	United States	2023 CE	Composite

Chronological listings of known Holocene eruptions (confirmed or uncertain) from volcanoes in the North America Volcanic Regions. Bolded eruptions indicate current continuing activity as of 2 May 2025.

Basin and Range Volcanic Province

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Pinacate	[1934 Dec 31]	[1935 Jan 2 (?)]	Uncertain
Pinacate	[1928 Jun 9]	[Unknown]	Uncertain
Mono Lake Volcanic Field	[1890 Aug 23 (?)]	[1890 Aug 23 (?)]	Uncertain
Mono Lake Volcanic Field	1790 ± 75 years	Unknown	Confirmed	Correlation: Tephrochronology
Mono Lake Volcanic Field	1550 ± 300 years	Unknown	Confirmed	Correlation: Tephrochronology
Mono-Inyo Craters	1380 ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Mono-Inyo Craters	1350 ± 20 years	Unknown	Confirmed	Sidereal: Dendrochronology
Black Rock Desert	1290 ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Mammoth Mountain	1260 ± 40 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Mono Lake Volcanic Field	1150 ± 200 years	Unknown	Confirmed	Chem/Bio: Hydration Rind
Uinkaret Field	1100 ± 75 years	Unknown	Confirmed	Correlation: Anthropology
San Francisco Volcanic Field	1075 ± 25 years	Unknown	Confirmed	Correlation: Magnetism
Markagunt Plateau	1050 (in or before)	Unknown	Confirmed	Unknown
Mono-Inyo Craters	1000 ± 200 years	Unknown	Confirmed	Chem/Bio: Hydration Rind
Mono-Inyo Craters	0620 ± 27 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Mono-Inyo Craters	0490 ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Mono-Inyo Craters	0440 ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Mono Lake Volcanic Field	0350 ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Mono-Inyo Craters	0320 ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Mono-Inyo Craters	0290 ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Mono-Inyo Craters	0010 ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Ubehebe Craters	0150 BCE (?)	Unknown	Confirmed	Correlation: Magnetism
Mono-Inyo Craters	0700 BCE ± 800 years	Unknown	Confirmed	Chem/Bio: Hydration Rind
Zuni-Bandera	1170 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Dotsero	2200 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Carrizozo	3250 BCE ± 500 years	Unknown	Confirmed	Isotopic: Cosmic Ray Exposure
Mono-Inyo Craters	3850 BCE ± 1160 years	Unknown	Confirmed	Chem/Bio: Hydration Rind
Mono-Inyo Craters	4050 BCE (?)	Unknown	Confirmed	Chem/Bio: Hydration Rind
Mammoth Mountain	6540 BCE ± 90 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Mono-Inyo Craters	6750 BCE ± 1740 years	Unknown	Confirmed	Chem/Bio: Hydration Rind
Zuni-Bandera	8710 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Red Hill-Quemado	9450 BCE ± 400 years	Unknown	Confirmed	Isotopic: Cosmic Ray Exposure
Red Hill-Quemado	9700 BCE ± 450 years	Unknown	Confirmed	Isotopic: Cosmic Ray Exposure
Red Hill-Quemado	9850 BCE ± 500 years	Unknown	Confirmed	Isotopic: Cosmic Ray Exposure
Golden Trout Creek	55500 BCE ± 3500 years	Unknown	Confirmed	Isotopic: Cosmic Ray Exposure

Yellowstone-Snake River Hotspot Volcano Group

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Craters of the Moon	0130 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	0260 BCE ± 25 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Wapi Lava Field	0300 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Craters of the Moon	0350 BCE (?)	Unknown	Confirmed	Correlation: Magnetism
Craters of the Moon	1680 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	2560 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Hell's Half Acre	3250 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	4070 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	4250 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Craters of the Moon	4600 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	5470 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	5890 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	8290 BCE	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Black Butte Crater Lava Field	8400 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	8720 BCE	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	9050 BCE	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Craters of the Moon	10060 BCE	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

High Lava Plains Volcanic Province

Volcano Name	Start Date	Stop Date	Certainty	VEI	Evidence
Jordan Craters	1250 BCE (in or after)	Unknown	Confirmed		Isotopic: 14C (uncalibrated)
Diamond Craters	5610 BCE ± 470 years	Unknown	Confirmed		Isotopic: 14C (calibrated)

California Coast Ranges Volcano Group

The Global Volcanism Program is not aware of any confirmed Holocene eruptions in this region.

High Cascades Volcanic Arc

Volcano Name	Start Date	Stop Date	Certainty	Evidence
St. Helens	2004 Oct 1	2008 Jan 27 ± 10 days	Confirmed	Observations: Reported
St. Helens	1990 Nov 5	1991 Feb 14	Confirmed	Observations: Reported
St. Helens	1989 Dec 7	1990 Jan 6	Confirmed	Observations: Reported
St. Helens	1980 Mar 27	1986 Oct 28 ± 3 days	Confirmed	Observations: Reported
St. Helens	[1921 Mar 18]	[Unknown]	Uncertain
Lassen Volcanic Center	1914 May 30	1917 Jun 29	Confirmed	Observations: Reported
Medicine Lake	[1910 Jan]	[Unknown]	Uncertain
St. Helens	[1903 Sep 15]	[Unknown]	Uncertain
St. Helens	[1898 Apr 5]	[Unknown]	Uncertain
Rainier	[1894 Nov 21 (?)]	[1894 Dec 24 (?)]	Uncertain
Rainier	[1882]	[Unknown]	Uncertain
Rainier	[1879]	[Unknown]	Uncertain
Rainier	[1870]	[Unknown]	Uncertain
Hood	[1869]	[Unknown]	Uncertain
Hood	1865 Sep 21	1866 Jan (?)	Confirmed	Observations: Reported
Hood	1859 Aug 15	1859 Aug 17	Confirmed	Observations: Reported
Rainier	[1858]	[Unknown]	Uncertain
St. Helens	1857 Apr	Unknown	Confirmed	Observations: Reported
Hood	[1854 Aug]	[Unknown]	Uncertain
St. Helens	1854 Feb	1854 Apr	Confirmed	Observations: Reported
Rainier	[1854]	[Unknown]	Uncertain
St. Helens	1853 Mar 15 ± 5 days	1853 Aug (?)	Confirmed	Observations: Reported
Hood	[1853]	[Unknown]	Uncertain
St. Helens	1850 Mar	1850 May (?)	Confirmed	Observations: Reported
St. Helens	[1849]	[Unknown]	Uncertain
St. Helens	1848 Apr 1 (on or before)	Unknown	Confirmed	Observations: Reported
St. Helens	1847 Mar 26	1847 Mar 30	Confirmed	Observations: Reported
Rainier	[1843]	[Unknown]	Uncertain
St. Helens	1842 Nov 22	1845 Sep 18 (?)	Confirmed	Observations: Reported
St. Helens	1835 Mar (?)	Unknown	Confirmed	Observations: Reported
St. Helens	1831 Aug	Unknown	Confirmed	Observations: Reported
St. Helens	1800 Jan 15 ± 120 days	Unknown	Confirmed	Sidereal: Dendrochronology
Hood	1781 Oct 15 ± 45 days	1801 (?)	Confirmed	Sidereal: Dendrochronology
Lassen Volcanic Center	1666 (?)	Unknown	Confirmed	Sidereal: Dendrochronology
Lassen Volcanic Center	[1650 (?)]	[Unknown]	Uncertain
St. Helens	1610 ± 40 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	1525 ± 25 years	Unknown	Confirmed	Sidereal: Dendrochronology
St. Helens	1482 Jan 15 ± 120 days	Unknown	Confirmed	Sidereal: Dendrochronology
St. Helens	1480 Jan 15 ± 120 days	Unknown	Confirmed	Sidereal: Dendrochronology
Rainier	1450 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	1250 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	1200 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Medicine Lake	1060 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Medicine Lake	1010 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Lassen Volcanic Center	0980 ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Jefferson	0950 (?)	Unknown	Confirmed	Sidereal: Varve Count
Adams	0950 (?)	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	0910 ± 500 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Lassen Volcanic Center	0880 ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	0850 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Medicine Lake	0840 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Medicine Lake	0830 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Lassen Volcanic Center	0800 ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Medicine Lake	0780 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0780 ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Newberry	0690 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Blue Lake Crater	0680 ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Newberry	0490 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Hood	0480 ± 37 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Belknap	0475 ± 215 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	0440 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Three Sisters	0439 ± 108 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0420 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0270 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0230 (?)	Unknown	Confirmed	Correlation: Tephrochronology
Adams	0200 (?)	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	0190 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	0150 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
St. Helens	0100 (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	0050 (?)	Unknown	Confirmed	Correlation: Tephrochronology
Three Sisters	0040 ± 202 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Three Sisters	0050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
St. Helens	0100 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	0150 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Rainier	0150 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	0220 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0250 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	0250 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	0280 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	0300 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Three Sisters	0350 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Adams	0400 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	0400 BCE ± 50 years	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	0500 BCE ± 50 years	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	0530 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	0550 BCE ± 1000 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	0550 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	0610 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	0650 BCE ± 50 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	0650 BCE ± 800 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Belknap	0685 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	0700 BCE ± 50 years	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	0800 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Three Sisters	0800 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	0830 BCE ± 75 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	0850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Sand Mountain Field	0950 BCE ± 200 years	Unknown	Confirmed	Correlation: Magnetism
Medicine Lake	1000 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	1010 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Belknap	1071 BCE ± 241 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	1100 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Medicine Lake	1130 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	1150 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
St. Helens	1180 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Newberry	1450 BCE (?)	Unknown	Confirmed	Chem/Bio: Hydration Rind
St. Helens	1610 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	1680 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
St. Helens	1770 BCE ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Adams	1850 BCE (in or after)	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	1860 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	2050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
St. Helens	2100 BCE ± 300 years	Unknown	Confirmed	Correlation: Tephrochronology
St. Helens	2340 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	2550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	2550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Adams	2650 BCE ± 300 years	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	2750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Davis Lake	2790 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Crater Lake	2850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	2950 BCE ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	3050 BCE ± 1000 years	Unknown	Confirmed	Correlation: Tephrochronology
Medicine Lake	3090 BCE	Unknown	Confirmed	Isotopic: 14C (calibrated)
Medicine Lake	3190 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	3250 BCE ± 300 years	Unknown	Confirmed	Correlation: Tephrochronology
Adams	3550 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	3650 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	3800 BCE ± 1950 years	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	3850 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	4050 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	4050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Newberry	4450 BCE (?)	Unknown	Confirmed	Chem/Bio: Hydration Rind
Jefferson	4500 BCE ± 50 years	Unknown	Confirmed	Sidereal: Varve Count
Adams	4550 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Newberry	4690 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Newberry	4770 BCE ± 75 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	4850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Newberry	4860 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Hood	4940 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Newberry	4960 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	5050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Sand Mountain Field	5050 BCE (?)	Unknown	Confirmed	Correlation: Magnetism
Belknap	5050 BCE (?)	Unknown	Confirmed	Correlation: Magnetism
Newberry	5070 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Adams	5150 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Crater Lake	5250 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Newberry	5260 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	5350 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Crater Lake	5550 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Rainier	5550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Crater Lake	5680 BCE ± 150 years	Unknown	Confirmed	Sidereal: Ice Core
West Crater	5750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Bachelor	5800 BCE ± 750 years	Unknown	Confirmed	Correlation: Magnetism
Crater Lake	5900 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	6050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
West Crater	6110 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Indian Heaven	6250 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	6650 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Adams	7050 BCE ± 1000 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	7250 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	7350 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Three Sisters	7350 BCE ± 2700 years	Unknown	Confirmed	Correlation: Tephrochronology
Shasta	7420 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	7650 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shasta	7750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Rainier	7800 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Rainier	8050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Shasta	8050 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Newberry	9210 BCE ± 1200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)

Garibaldi Volcanic Arc

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Baker	[1884]	[Unknown]	Uncertain
Baker	1880 Sep 7	1880 Nov 27	Confirmed	Observations: Reported
Baker	1870	Unknown	Confirmed	Observations: Reported
Baker	[1869 Jun]	[Unknown]	Uncertain
Baker	[1867 Mar]	[Unknown]	Uncertain
Baker	[1865]	[Unknown]	Uncertain
Baker	1863 Jul	Unknown	Confirmed	Observations: Reported
Baker	[1860 Dec]	[Unknown]	Uncertain
Baker	1859 Nov	1860 Apr 26 (?)	Confirmed	Observations: Reported
Baker	1858	Unknown	Confirmed	Observations: Reported
Baker	[1856]	[Unknown]	Uncertain
Baker	1854	Unknown	Confirmed	Observations: Reported
Baker	1852 Dec 1 ± 30 days	1853 Jan (?)	Confirmed	Observations: Reported
Baker	[1850 Mar]	[Unknown]	Uncertain
Baker	[1846]	[Unknown]	Uncertain
Baker	1843	Unknown	Confirmed	Observations: Reported
Baker	1820 (?)	Unknown	Confirmed	Observations: Reported
Baker	[1792 Jun]	[Unknown]	Uncertain
Glacier Peak	1700 ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Glacier Peak	[1300 ± 300 years]	[Unknown]	Uncertain
Glacier Peak	0900 ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Glacier Peak	0200 ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Meager	0410 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Glacier Peak	0850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Glacier Peak	3150 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Glacier Peak	3550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Baker	4550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Baker	7850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Garibaldi	8060 BCE ± 500 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

Interior Western Canada Volcanic Province

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Wells Gray-Clearwater	1550 (?)	Unknown	Confirmed	Sidereal: Dendrochronology
Nazko	5220 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Wells Gray-Clearwater	5650 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

Queen Charlotte Volcano Group

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Edgecumbe	2360 BCE ± 140 years	2080 BCE ± 90 years	Confirmed	Isotopic: 14C (uncalibrated)
Edgecumbe	3810 BCE ± 70 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Edgecumbe	7215 BCE ± 165 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Edgecumbe	9300 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

Northern Cordilleran Volcanic Province

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Iskut-Unuk River Cones	[1904]	[Unknown]	Uncertain
Atlin Volcanic Field	[1898 Nov 8]	[Unknown]	Uncertain
Iskut-Unuk River Cones	1800 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Tseax River Cone	1690 ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Iskut-Unuk River Cones	1590 ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Tseax River Cone	1330 ± 75 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Edziza	0950 ± 6000 years	Unknown	Confirmed	Radiogenic: Fission track
Edziza	0630 ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Iskut-Unuk River Cones	0620 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Edziza	0750 BCE ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Iskut-Unuk River Cones	1830 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Iskut-Unuk River Cones	3450 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Iskut-Unuk River Cones	4700 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Edziza	6520 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Iskut-Unuk River Cones	6830 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Hoodoo Mountain	7050 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology

Northern Alaska-Bering Sea Volcanic Province

Volcano Name	Start Date	Stop Date	Certainty	Evidence
St. Paul Island	[1943]	[Unknown]	Uncertain
Imuruk Lake	0300 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
St. Paul Island	1280 BCE ± 40 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

Wrangell Volcanic Arc

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Wrangell	[2002 Aug 1]	[2002 Aug 2]	Uncertain
Wrangell	[1999 May 14]	[1999 May 14]	Uncertain
Wrangell	[1969 Aug 16 ± 15 days]	[Unknown]	Uncertain
Wrangell	[1930 Jun 30]	[Unknown]	Uncertain
Wrangell	[1921 Jul 3]	[1921 Jul 3]	Uncertain
Wrangell	1911 Apr 14	1912 Sep 14 (?)	Confirmed	Observations: Reported
Wrangell	[1907 Apr 1 (on or before)]	[Unknown]	Uncertain
Wrangell	1902 Jul 15 ± 45 days	Unknown	Confirmed	Observations: Reported
Wrangell	1900 Jun (on or before)	Unknown	Confirmed	Observations: Reported
Wrangell	1899 Sep 3	Unknown	Confirmed	Observations: Reported
Wrangell	[1884 Oct 26]	[1885 Feb 4]	Uncertain
Wrangell	[1819]	[Unknown]	Uncertain
Wrangell	[1784 Jul]	[Unknown]	Uncertain
Churchill	0847 ± 1 years	Unknown	Confirmed	Correlation: Tephrochronology
Wrangell	0190 ± 200 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Churchill	0063 ± 200 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)

Alaska Peninsula Volcanic Arc

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Redoubt	2009 Mar 15	2009 Jul 1 ± 30 days	Confirmed	Observations: Reported
Fourpeaked	2006 Sep 17	2006 Sep 17	Confirmed	Observations: Reported
Augustine	2005 Dec 9 (?)	2006 Apr 27 (?)	Confirmed	Observations: Reported
Chiginagak	1998 Aug 13	1998 Aug 13 (?)	Confirmed	Observations: Reported
Spurr	1992 Jun 27	1992 Sep 17	Confirmed	Observations: Reported
Redoubt	1989 Dec 14	1990 Jun 20 (?)	Confirmed	Observations: Reported
Augustine	1986 Mar 27	1986 Aug 31	Confirmed	Observations: Reported
Ukinrek Maars	1977 Mar 30	1977 Apr 9	Confirmed	Observations: Reported
Augustine	1976 Jan 22 (?)	1977 May 14 (?)	Confirmed	Observations: Reported
Trident	1974 Jul 15 ± 45 days	Unknown	Confirmed	Observations: Reported
Augustine	1971 Oct 7	1971 Oct 8	Confirmed	Observations: Reported
Chiginagak	1971 Jul 16 ± 15 days	1971 Jul 16 ± 15 days	Confirmed	Observations: Reported
Trident	1968 Nov 13	1968 Nov 13	Confirmed	Observations: Reported
Redoubt	1967 Dec 6	1968 Apr 28 (on or after)	Confirmed	Observations: Reported
Trident	1967 Sep 5	1968 Feb 25	Confirmed	Observations: Reported
Redoubt	1966 Oct 7	1967 Jan 15	Confirmed	Observations: Reported
Trident	1966 Jul 2 (?) ± 182 days	Unknown	Confirmed	Observations: Reported
Redoubt	1966 Jan 24	1966 Feb 20	Confirmed	Observations: Reported
Trident	1964 May 31	Unknown	Confirmed	Observations: Reported
Trident	1963 Oct 17	1963 Nov 17 (?)	Confirmed	Observations: Reported
Augustine	1963 Oct 11	1964 Aug 19	Confirmed	Observations: Reported
Trident	1963 Apr 1	1963 Apr 3	Confirmed	Observations: Reported
Trident	1962 Jun 9	1962 Jun 9	Confirmed	Observations: Reported
Trident	1961 Jun 30 (?)	Unknown	Confirmed	Observations: Reported
Trident	1957 Jul 2 ± 182 days	1960 Aug 10 (?)	Confirmed	Observations: Reported
Trident	1956 Sep 8	1956 Sep 9	Confirmed	Unknown
Spurr	1953 Jul 9	1953 Jul 16	Confirmed	Observations: Reported
Iliamna	[1953 Mar 1]	[Unknown]	Uncertain
Martin	1953 Feb 17	Unknown	Confirmed	Unknown
Trident	1953 Feb 15	1954 Oct 5 (?)	Confirmed	Observations: Reported
Iliamna	[1952 Jul 2 ± 182 days]	[Unknown]	Uncertain
Martin	1951 Jul 22	Unknown	Confirmed	Unknown
Trident	1950 Jul 2	1950 Aug 18	Confirmed	Unknown
Trident	1949 Jun	Unknown	Confirmed	Observations: Reported
Iliamna	[1947 Jun]	[Unknown]	Uncertain
Mageik	[1946]	[Unknown]	Uncertain
Aniakchak	[1942]	[Unknown]	Uncertain
Mageik	[1936 Jul 4]	[1936 Jul 5]	Uncertain
Augustine	1935 Mar 13	1935 Aug 18	Confirmed	Observations: Reported
Redoubt	[1933 May 25]	[Unknown]	Uncertain
Iliamna	[1933 May 5]	[Unknown]	Uncertain
Aniakchak	1931 May 1	1931 Jun 13 (on or after)	Confirmed	Observations: Reported
Chiginagak	[1929 Dec]	[Unknown]	Uncertain
Mageik	[1929 Aug 19]	[1929 Dec]	Uncertain
Mageik	[1927 Aug 26 ± 5 days]	[Unknown]	Uncertain
Trident	1913 Sep	Unknown	Confirmed	Observations: Reported
Katmai	1912 Jun 6	1912 Jul 21 (on or after)	Confirmed	Observations: Reported
Novarupta	1912 Jun 6	1912 Oct (?)	Confirmed	Observations: Reported
Augustine	1908	Unknown	Confirmed	Observations: Reported
Redoubt	1902 Jan 18	Unknown	Confirmed	Observations: Reported
Augustine	1883 Oct 6	1884 (?)	Confirmed	Observations: Reported
Iliamna	1876	Unknown	Confirmed	Observations: Reported
Iliamna	1867	Unknown	Confirmed	Observations: Reported
Ugashik-Peulik	[1852]	[Unknown]	Uncertain
Iliamna	[1843]	[Unknown]	Uncertain
Redoubt	[1819]	[Unknown]	Uncertain
Ugashik-Peulik	1814	Unknown	Confirmed	Observations: Reported
Augustine	1812	Unknown	Confirmed	Observations: Reported
Iliamna	[1793]	[Unknown]	Uncertain
Iliamna	[1786]	[Unknown]	Uncertain
Iliamna	1778	1779	Confirmed	Observations: Reported
Iliamna	[1768]	[Unknown]	Uncertain
Snowy Mountain	1710 ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Iliamna	1650 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	1650 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Spurr	1650 ± 50 years	Unknown	Confirmed	Correlation: Tephrochronology
Augustine	1650 ± 100 years	Unknown	Confirmed	Correlation: Tephrochronology
Augustine	1540 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Aniakchak	1540 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1530 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1510 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	1470 ± 20 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1400 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	1370 ± 55 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1360 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	1280 ± 145 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Augustine	1230 ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1200 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Hayes	1200 ± 300 years	Unknown	Confirmed	Correlation: Tephrochronology
Aniakchak	1190 ± 30 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1160 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1120 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	1120 ± 80 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Aniakchak	1050 (?)	Unknown	Confirmed	Correlation: Tephrochronology
Ugashik-Peulik	1050 ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	1030 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	0930 ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	0720 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	0700 ± 250 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	0640 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0580 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	0570 ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	0520 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	0460 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0440 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	0340 ± 40 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	0290 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	0200 ± 255 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	0190 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0110 ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0070 ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0090 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0100 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	0120 BCE ± 40 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	0160 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0210 BCE ± 200 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	0220 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0270 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	0310 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Augustine	0350 BCE ± 200 years	Unknown	Confirmed	Correlation: Tephrochronology
Ukinrek Maars	0350 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0350 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	0370 BCE ± 210 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	0380 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0390 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0400 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0420 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0450 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Iliamna	0450 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0470 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Mageik	0500 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Mageik	0550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0600 BCE ± 75 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0610 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0620 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Mageik	0650 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	0670 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0770 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0790 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Martin	0800 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Yantarni	0800 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	0830 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	0870 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1040 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1050 BCE (?)	Unknown	Confirmed	Sidereal: Varve Count
Buzzard Creek	1050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	1080 BCE ± 150 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	1100 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1150 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1210 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1310 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1350 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1510 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1540 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1550 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Hayes	1550 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	1560 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	1645 BCE ± 10 years	Unknown	Confirmed	Sidereal: Ice Core
Mageik	1650 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	1690 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	1700 BCE ± 100 years	Unknown	Confirmed	Sidereal: Varve Count
Martin	1750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Griggs	1790 BCE ± 40 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	1810 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	1820 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Hayes	1850 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	1870 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Black Peak	1900 BCE ± 150 years	Unknown	Confirmed	Correlation: Tephrochronology
Mageik	1950 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Augustine	2040 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	2040 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Iliamna	2050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	2230 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	2350 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	2550 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Redoubt	2830 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	2860 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	2920 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3030 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3150 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3180 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Spurr	3250 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	3600 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3650 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3690 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	3730 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Kaguyak	3850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	3890 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	4010 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Spurr	4050 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Kaguyak	4060 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Augustine	4150 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	4360 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Mageik	4400 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	4510 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	4810 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	4900 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	4960 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Iliamna	5050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Spurr	5110 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	5240 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Augustine	5420 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	5580 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	5820 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Ugashik-Peulik	5850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	5910 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	5930 BCE ± 240 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	5940 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	5950 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	6050 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Spurr	6050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	6150 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	6190 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	6280 BCE ± 150 years	Unknown	Confirmed	Sidereal: Varve Count
Aniakchak	6300 BCE ± 1250 years	Unknown	Confirmed	Correlation: Tephrochronology
Ugashik-Peulik	6550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Redoubt	7210 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	7270 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	7380 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Mageik	7380 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	7430 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Redoubt	7800 BCE ± 200 years	Unknown	Confirmed	Sidereal: Varve Count
Mageik	8670 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Redoubt	9310 BCE ± 300 years	Unknown	Confirmed	Sidereal: Varve Count

Aleutian Ridge Volcanic Arc

Volcano Name	Start Date	Stop Date	Certainty	Evidence
Atka Volcanic Complex	2025 Feb 20	2025 May 2 (continuing)	Confirmed	Observations: Reported
Atka Volcanic Complex	2024 Mar 27	2024 Mar 27	Confirmed	Observations: Reported
Kanaga	2023 Dec 18	2023 Dec 18	Confirmed	Observations: Seismicity
Shishaldin	2023 Jul 11 ± 1 days	2023 Nov 3	Confirmed	Observations: Reported
Pavlof	2021 Aug 5	2022 Dec 7	Confirmed	Observations: Reported
Great Sitkin	2021 May 25	2025 May 2 (continuing)	Confirmed	Observations: Reported
Veniaminof	2021 Feb 28	2021 Apr 5	Confirmed	Observations: Reported
Semisopochnoi	2021 Feb 2 ± 2 days	2023 May 5	Confirmed	Observations: Reported
Cleveland	2020 Jun 1	2020 Jun 1	Confirmed	Observations: Reported
Semisopochnoi	2019 Dec 7	2020 Jun 19	Confirmed	Observations: Reported
Cleveland	[2019 Nov 7]	[2019 Dec 7 (?)]	Uncertain
Shishaldin	2019 Jul 23	2020 May 4	Confirmed	Observations: Reported
Semisopochnoi	2019 Jul 16	2019 Aug 24	Confirmed	Observations: Reported
Great Sitkin	2019 Jun 1	2019 Jun 7	Confirmed	Observations: Reported
Semisopochnoi	2018 Sep 8	2018 Oct 31	Confirmed	Observations: Reported
Veniaminof	2018 Sep 4	2018 Dec 23	Confirmed	Observations: Reported
Great Sitkin	2018 Jun 10	2018 Aug 11	Confirmed	Observations: Reported
Bogoslof	2016 Dec 20	2017 Aug 30	Confirmed	Observations: Reported
Cleveland	2016 Apr 16	2019 Jan 20 ± 4 days	Confirmed	Observations: Reported
Pavlof	2016 Mar 27	2016 Jul 30	Confirmed	Observations: Reported
Pavlof	2014 Nov 12	2014 Nov 15	Confirmed	Observations: Reported
Pavlof	2014 May 31	2014 Jun 6	Confirmed	Observations: Reported
Shishaldin	2014 Jan 30	2015 Jul 3	Confirmed	Observations: Reported
Veniaminof	2013 Jun 13	2013 Oct 12 ± 1 days	Confirmed	Observations: Reported
Pavlof	2013 May 13	2013 Jun 26	Confirmed	Observations: Reported
Kanaga	2012 Feb 18	2012 Feb 18	Confirmed	Observations: Reported
Cleveland	2011 Jul 19 ± 7 days	2015 Aug 18	Confirmed	Observations: Reported
Cleveland	[2010 Sep 11]	[2010 Sep 12]	Uncertain
Cleveland	2010 May 30	2010 Jun 2 (?)	Confirmed	Observations: Reported
Cleveland	2009 Oct 2	2009 Dec 12 (?)	Confirmed	Observations: Reported
Cleveland	2009 Jun 25	2009 Jun 25	Confirmed	Observations: Reported
Cleveland	2009 Jan 2	2009 Jan 21	Confirmed	Observations: Reported
Kasatochi	2008 Aug 7	2008 Aug 9 (?)	Confirmed	Observations: Reported
Okmok	2008 Jul 12	2008 Aug 19	Confirmed	Observations: Reported
Veniaminof	2008 Feb 22	2008 Mar 1	Confirmed	Observations: Reported
Shishaldin	[2008 Feb 12]	[2008 Feb 12]	Uncertain
Pavlof	2007 Aug 15	2007 Sep 13	Confirmed	Observations: Reported
Cleveland	2007 Jun 17 (?)	2008 Aug 12 (?)	Confirmed	Observations: Reported
Atka Volcanic Complex	2006 Nov 25 ± 5 days	2007 Mar 3 (on or before)	Confirmed	Observations: Reported
Veniaminof	2006 Mar 3	2006 Sep 7	Confirmed	Observations: Reported
Cleveland	2006 Feb 6	2006 Oct 28	Confirmed	Observations: Reported
Veniaminof	2005 Sep 7	2005 Nov 4 (?)	Confirmed	Observations: Reported
Cleveland	2005 Mar 13 (?)	2005 Nov 27 ± 1 days	Confirmed	Observations: Reported
Atka Volcanic Complex	2005 Feb 23	2005 May 5 ± 4 days	Confirmed	Observations: Reported
Veniaminof	2005 Jan 4	2005 Feb 14 ± 3 days	Confirmed	Observations: Reported
Atka Volcanic Complex	2004 Jun 23 ± 10 days	2004 Jul 4 (on or before)	Confirmed	Observations: Satellite (visual)
Shishaldin	2004 Feb 17	2004 Jul 16 (on or after) ± 15 days	Confirmed	Observations: Reported
Veniaminof	2004 Feb 16	2004 Sep 5 ± 4 days	Confirmed	Observations: Reported
Veniaminof	2002 Sep 24	2003 Mar 23	Confirmed	Observations: Reported
Atka Volcanic Complex	2002 Jun 24 ± 10 days	2002 Jul 5 (on or before)	Confirmed	Observations: Photo / Video
Pavlof	[2001 Jun 5 ± 4 days]	[Unknown]	Uncertain
Cleveland	2001 Feb 2 (on or before)	2001 Apr 15 (?)	Confirmed	Observations: Reported
Shishaldin	[2000 Aug 11]	[Unknown]	Uncertain
Shishaldin	[1999 Sep 25 ± 5 days]	[2000 Feb 4 (?)]	Uncertain
Shishaldin	1999 Mar 13	1999 May 27	Confirmed	Observations: Reported
Shishaldin	1998 Nov 4	1998 Nov 4	Confirmed	Observations: Reported
Atka Volcanic Complex	1998 May 8 ± 1 days	1998 Jul 8 (?)	Confirmed	Observations: Reported
Shishaldin	1997 Jun 2	1997 Jun 2	Confirmed	Observations: Reported
Cleveland	1997 May 5	1997 May 5	Confirmed	Observations: Reported
Amukta	[1997 Mar 3]	[Unknown]	Uncertain
Okmok	1997 Feb 11	1997 May 19 ± 4 days	Confirmed	Observations: Reported
Gareloi	[1996 Sep 27]	[Unknown]	Uncertain
Amukta	1996 Sep 17	1996 Sep 18	Confirmed	Observations: Reported
Pavlof	1996 Sep 11	1997 Jan 3 (?)	Confirmed	Observations: Reported
Kanaga	[1996 Jun 11]	[Unknown]	Uncertain
Shishaldin	1995 Dec 23	1996 May 16 (on or before)	Confirmed	Observations: Reported
Veniaminof	1995 Nov 15	1995 Nov 30 (?)	Confirmed	Observations: Reported
Kanaga	1995 Jun 19 (?)	1995 Jun 23 (?)	Confirmed	Observations: Reported
Atka Volcanic Complex	[1995 May 1]	[Unknown]	Uncertain
Veniaminof	1995 Apr 17	1995 Apr 17	Confirmed	Observations: Reported
Makushin	1995 Jan 30	1995 Jan 30	Confirmed	Observations: Reported
Cleveland	1994 Oct 20	1994 Oct 20	Confirmed	Observations: Reported
Cleveland	1994 May 25	1994 May 25	Confirmed	Observations: Reported
Kanaga	1994 Jan 5 ± 4 days	1994 Nov 26 ± 4 days	Confirmed	Observations: Reported
Shishaldin	1993 Sep 4	1993 Oct 29	Confirmed	Observations: Reported
Makushin	1993 Aug 16 ± 15 days	1994 Jan 19 (?)	Confirmed	Observations: Reported
Veniaminof	1993 Jul 30	1994 Sep 28 (?)	Confirmed	Observations: Reported
Seguam	1993 May 28	1993 Aug 31 (on or after)	Confirmed	Observations: Reported
Seguam	1992 Dec 27	1992 Dec 30	Confirmed	Observations: Reported
Akutan	1992 Dec 18	1992 Dec 18	Confirmed	Observations: Reported
Bogoslof	1992 Jul 6	1992 Jul 24	Confirmed	Observations: Reported
Akutan	1992 Mar 8	1992 May 21	Confirmed	Observations: Reported
Westdahl	1991 Nov 29	1992 Jan 14	Confirmed	Observations: Reported
Akutan	1991 Sep 15	1991 Oct 29 ± 1 days	Confirmed	Observations: Reported
Akutan	1990 Sep 6	1990 Oct 1	Confirmed	Observations: Reported
Kiska	1990 Jun 1	1990 Jun 1 (?)	Confirmed	Observations: Reported
Pavlof	1990 Mar 5	1990 Mar 5	Confirmed	Observations: Reported
Akutan	1990 Jan 26 ± 5 days	1990 Jan 26 ± 5 days	Confirmed	Observations: Reported
Cleveland	[1989 Oct 25 ± 3 days]	[Unknown]	Uncertain
Gareloi	1989 Aug 17	1989 Aug 17	Confirmed	Observations: Reported
Akutan	1989 Feb 27	1989 Mar 28 (on or before)	Confirmed	Observations: Reported
Akutan	1988 Mar 26	1988 Jul 20	Confirmed	Observations: Reported
Carlisle	[1987 Nov 16]	[Unknown]	Uncertain
Amukta	1987 Sep 4 (?)	1987 Sep 4 (?)	Confirmed	Observations: Reported
Gareloi	1987 Aug 30 ± 5 days	1987 Sep 4 (on or before)	Confirmed	Observations: Reported
Cleveland	1987 Jun 19	1987 Aug 28	Confirmed	Observations: Reported
Kiska	[1987 Apr 15]	[Unknown]	Uncertain
Semisopochnoi	1987 Apr 13	1987 Apr 18 ± 5 days	Confirmed	Observations: Reported
Veniaminof	1987 Mar 19	1987 Mar 19	Confirmed	Observations: Reported
Great Sitkin	[1987 Mar 18]	[Unknown]	Uncertain
Kupreanof	[1987 Mar 10]	[1987 Mar 10]	Uncertain
Atka Volcanic Complex	1987 Mar 4 (?)	1987 Mar 19 (?)	Confirmed	Observations: Reported
Makushin	1987 Mar 2	1987 Mar 2	Confirmed	Observations: Reported
Akutan	1987 Jan 31	1987 Jun 24	Confirmed	Observations: Reported
Okmok	1986 Nov 18	1988 Feb 26	Confirmed	Observations: Reported
Atka Volcanic Complex	[1986 May 23]	[Unknown]	Uncertain
Cleveland	1986 Apr 28	1986 May 27 (on or after)	Confirmed	Observations: Reported
Pavlof	1986 Apr 16	1988 Aug 13	Confirmed	Observations: Reported
Shishaldin	1986 Mar 19	1987 Feb 15 (?)	Confirmed	Observations: Reported
Akutan	1986 Mar 18	1986 Jun 30	Confirmed	Observations: Reported
Cleveland	[1985 Dec 10]	[Unknown]	Uncertain
Veniaminof	1984 Nov 29	1984 Dec 6 (?)	Confirmed	Observations: Reported
Cleveland	1984 Jul 12	1984 Jul 12	Confirmed	Observations: Reported
Pavlof	1983 Nov 11	1983 Dec 18	Confirmed	Observations: Reported
Pavlof	1983 Jul 11	1983 Jul 18	Confirmed	Observations: Reported
Okmok	1983 Jul 8	1983 Jul 8	Confirmed	Observations: Reported
Veniaminof	1983 Jun 2	1984 Apr 17	Confirmed	Observations: Reported
Akutan	1982 Oct 5 ± 4 days	1983 May 16 ± 15 days	Confirmed	Observations: Reported
Pavlof	[1982 Jul 15 ± 45 days]	[Unknown]	Uncertain
Gareloi	1982 Jan 15	1982 Jan 15	Confirmed	Observations: Reported
Pavlof	1981 Sep 25	1981 Sep 27	Confirmed	Observations: Reported
Shishaldin	[1981 Sep 25]	[Unknown]	Uncertain
Pavlof	1981 Mar 30 (on or before)	1981 May 28	Confirmed	Observations: Reported
Okmok	1981 Mar 24	1981 Mar 24	Confirmed	Observations: Reported
Pavlof	1980 Nov 8	1980 Nov 13	Confirmed	Observations: Reported
Gareloi	1980 Aug 7	1980 Sep 17	Confirmed	Observations: Reported
Pavlof	[1980 Jul 6 ± 1 days]	[Unknown]	Uncertain
Akutan	1980 Jul 3 (on or before)	1980 Jul 8 (?)	Confirmed	Observations: Reported
Makushin	1980 May 1 ± 60 days	1980 Jul 4 ± 3 days	Confirmed	Observations: Reported
Shishaldin	1979 Feb 16 ± 15 days	Unknown	Confirmed	Observations: Reported
Westdahl	[1979 Feb 8]	[1979 Feb 9]	Uncertain
Akutan	1978 Sep 25 ± 5 days	1978 Oct 16 ± 15 days	Confirmed	Observations: Reported
Shishaldin	1978 Feb 8	1978 Feb 9 (?)	Confirmed	Observations: Reported
Westdahl	1978 Feb 4	1978 Feb 9	Confirmed	Observations: Reported
Seguam	1977 Mar 6	1977 Mar 8 (?)	Confirmed	Observations: Reported
Akutan	1976 Oct 15 ± 45 days	1977 May 9 (on or after)	Confirmed	Observations: Reported
Atka Volcanic Complex	[1976 Jul 2 ± 182 days]	[Unknown]	Uncertain
Shishaldin	1976 Jan 16 ± 15 days	1976 Sep 28	Confirmed	Observations: Reported
Cleveland	[1975 Sep 16 ± 15 days]	[Unknown]	Uncertain
Shishaldin	1975 Sep 13	1975 Oct 26 ± 5 days	Confirmed	Observations: Reported
Pavlof	1975 Sep 13	1977 Mar 16 (on or after) ± 15 days	Confirmed	Observations: Reported
Pavlof	1974 Sep 1 (on or before)	1975 Jan 13	Confirmed	Observations: Reported
Pavlof	1974 Mar 12	1974 Mar 24 (?)	Confirmed	Observations: Reported
Great Sitkin	1974 Feb 19	1974 Sep 16 ± 15 days	Confirmed	Observations: Reported
Akutan	1974 Feb 11 (on or before)	Unknown	Confirmed	Observations: Reported
Pavlof	1973 Nov 12	1973 Nov 13	Confirmed	Observations: Reported
Atka Volcanic Complex	1973 Aug 25 ± 2 days	Unknown	Confirmed	Observations: Reported
Akutan	1973 Mar 16 (?) ± 15 days	1973 May 16 ± 15 days	Confirmed	Observations: Reported
Akutan	[1972 Sep 16 (?) ± 15 days]	[Unknown]	Uncertain
Kiska	1969 Sep 11	1969 Sep 16	Confirmed	Observations: Reported
Shishaldin	1967 Jan 28	Unknown	Confirmed	Observations: Reported
Pavlof	1966 Mar 15	Unknown	Confirmed	Observations: Reported
Kiska	1964 Mar 18	Unknown	Confirmed	Observations: Reported
Westdahl	1964 Mar 10	1964 Apr 16	Confirmed	Observations: Reported
Shishaldin	1963 Dec 28	Unknown	Confirmed	Observations: Reported
Amukta	1963 Feb 13	Unknown	Confirmed	Observations: Reported
Akutan	1962 Nov 5 ± 4 days	Unknown	Confirmed	Observations: Reported
Kiska	1962 Jan 24	Unknown	Confirmed	Observations: Reported
Okmok	1960 Oct 15 ± 45 days	1961 Apr 15 ± 45 days	Confirmed	Observations: Reported
Pavlof	1960 Jul 2 (?) ± 182 days	1963 Jun 16 (?) ± 15 days	Confirmed	Observations: Reported
Okmok	1958 Aug 14	1958 Aug 25 ± 10 days	Confirmed	Observations: Reported
Pavlof	1958 May 17	1958 Aug 28	Confirmed	Observations: Reported
Vsevidof	[1957 Mar 11]	[1957 Mar 12]	Uncertain
Veniaminof	1956 Mar 16 ± 15 days	1956 May 23	Confirmed	Observations: Reported
Shishaldin	1955 Jul 16 ± 15 days	Unknown	Confirmed	Observations: Reported
Pavlof	1953 Nov 25	1954 Aug 16 ± 15 days	Confirmed	Observations: Reported
Shishaldin	1953 Oct 4 ± 3 days	Unknown	Confirmed	Observations: Reported
Akutan	1953 Jul 2 ± 182 days	Unknown	Confirmed	Observations: Reported
Atka Volcanic Complex	[1953 Jul 2 ± 182 days]	[1954 Jul 2 ± 182 days]	Uncertain
Cleveland	[1953 Jun 25]	[Unknown]	Uncertain
Makushin	[1952 Jul 2 ± 182 days]	[Unknown]	Uncertain
Gareloi	1952 Jan 17	Unknown	Confirmed	Observations: Reported
Makushin	1951 Dec 20	Unknown	Confirmed	Observations: Reported
Cleveland	[1951 Nov 1]	[1951 Dec 16 ± 15 days]	Uncertain
Akutan	1951 Oct 16 ± 15 days	Unknown	Confirmed	Observations: Reported
Pavlof	1951 Oct 16 ± 15 days	1952 Feb 16 (?) ± 15 days	Confirmed	Observations: Reported
Bogoslof	[1951 Sep 21]	[Unknown]	Uncertain
Atka Volcanic Complex	[1951 Jul 2 ± 182 days]	[Unknown]	Uncertain
Shishaldin	1951 Apr 16 ± 15 days	1951 Oct 5 ± 4 days	Confirmed	Observations: Reported
Great Sitkin	1950 Nov 5	1950 Nov 29	Confirmed	Observations: Reported
Pavlof	1950 Jul 31	1951 May 16 ± 15 days	Confirmed	Observations: Reported
Gareloi	1950 Jul 2 ± 182 days	1951 Jul 2 ± 182 days	Confirmed	Observations: Reported
Great Sitkin	1949 Dec 30	1950 Jan 7	Confirmed	Observations: Reported
Akutan	1948 Apr 29	1948 Aug 7 (on or after)	Confirmed	Observations: Reported
Shishaldin	1948	Unknown	Confirmed	Observations: Reported
Akutan	1946 Dec	1947 Jan	Confirmed	Observations: Reported
Great Sitkin	[1946 Aug 14]	[Unknown]	Uncertain
Shishaldin	1946 Aug	1947 Jan	Confirmed	Observations: Reported
Okmok	1945 Jun 4	1945 Dec	Confirmed	Observations: Reported
Great Sitkin	1945 Mar	Unknown	Confirmed	Observations: Reported
Cleveland	1944 Jun 10	1944 Jun 12	Confirmed	Observations: Reported
Veniaminof	1944 Mar 28	Unknown	Confirmed	Observations: Reported
Okmok	1943 Jun	Unknown	Confirmed	Observations: Reported
Kanaga	1942	Unknown	Confirmed	Observations: Reported
Veniaminof	1939 Nov	Unknown	Confirmed	Observations: Reported
Veniaminof	1939 May 23	1939 Jun 26 (?)	Confirmed	Observations: Reported
Makushin	1938 Oct	Unknown	Confirmed	Observations: Reported
Okmok	1938	Unknown	Confirmed	Observations: Reported
Cleveland	1938	Unknown	Confirmed	Observations: Reported
Yunaska	1937 Nov 3	1937 Nov 4	Confirmed	Observations: Reported
Pavlof	1936	1948 May (?)	Confirmed	Observations: Reported
Okmok	[1936]	[Unknown]	Uncertain
Great Sitkin	1933 Nov	Unknown	Confirmed	Observations: Reported
Shishaldin	1932 Feb 1	1932 May 21	Confirmed	Observations: Reported
Cleveland	1932 Jan 1	Unknown	Confirmed	Observations: Reported
Bogoslof	1931 Oct 31	Unknown	Confirmed	Observations: Reported
Akutan	1931 May	1931 Aug	Confirmed	Observations: Reported
Okmok	1931 Mar 21	1931 May 13 (on or after)	Confirmed	Observations: Reported
Veniaminof	1930 Jun	Unknown	Confirmed	Observations: Reported
Kagamil	1929 Dec	Unknown	Confirmed	Observations: Reported
Shishaldin	1929 May 28	1929 Jun 23 (on or after)	Confirmed	Observations: Reported
Akutan	1929 May (?)	Unknown	Confirmed	Observations: Reported
Gareloi	1929 Apr	1930	Confirmed	Observations: Reported
Cleveland	[1929 Mar]	[Unknown]	Uncertain
Pavlof	1929 Mar	1931 Aug	Confirmed	Observations: Reported
Yunaska	[1929]	[Unknown]	Uncertain
Shishaldin	1928 Aug	Unknown	Confirmed	Observations: Reported
Shishaldin	1927	Unknown	Confirmed	Observations: Reported
Akutan	1927	1928	Confirmed	Observations: Reported
Gareloi	[1927]	[Unknown]	Uncertain
Kiska	[1927]	[Unknown]	Uncertain
Seguam	[1927]	[Unknown]	Uncertain
Makushin	1926 Dec 30	Unknown	Confirmed	Observations: Reported
Bogoslof	1926 Jul	1928	Confirmed	Observations: Reported
Shishaldin	1925	Unknown	Confirmed	Observations: Reported
Pavlof	1924 Jan 17	Unknown	Confirmed	Observations: Reported
Pavlof	1922 Dec 24	1923 Feb 28 ± 60 days	Confirmed	Observations: Reported
Shishaldin	1922 Oct 15 ± 45 days	Unknown	Confirmed	Observations: Reported
Gareloi	1922	Unknown	Confirmed	Observations: Reported
Pavlof	1917 Oct	Unknown	Confirmed	Observations: Reported
Pavlof	1914 Jul 6	Unknown	Confirmed	Observations: Reported
Tanaga	1914	Unknown	Confirmed	Observations: Reported
Bogoslof	[1913 Jul]	[Unknown]	Uncertain
Shishaldin	[1912]	[Unknown]	Uncertain
Akutan	[1912]	[Unknown]	Uncertain
Makushin	[1912]	[Unknown]	Uncertain
Akutan	1911	Unknown	Confirmed	Observations: Reported
Bogoslof	1909 Sep	1910 Sep 19	Confirmed	Observations: Reported
Akutan	1908 Feb 22	Unknown	Confirmed	Observations: Reported
Bogoslof	[1908 Jan 15 ± 45 days]	[Unknown]	Uncertain
Akutan	1907	Unknown	Confirmed	Observations: Reported
Makushin	1907	Unknown	Confirmed	Observations: Reported
Kiska	[1907]	[Unknown]	Uncertain
Atka Volcanic Complex	1907	Unknown	Confirmed	Observations: Reported
Kanaga	1906 May	Unknown	Confirmed	Observations: Reported
Bogoslof	1906 Mar 1 ± 30 days	1907 Sep 1	Confirmed	Observations: Reported
Pavlof	1906	1911 Dec 7 (?)	Confirmed	Observations: Reported
Kanaga	1904	Unknown	Confirmed	Observations: Reported
Great Sitkin	[1904]	[Unknown]	Uncertain
Seguam	1902	Unknown	Confirmed	Observations: Reported
Pavlof	1901	Unknown	Confirmed	Observations: Reported
Shishaldin	1901	Unknown	Confirmed	Observations: Reported
Shishaldin	[1899]	[Unknown]	Uncertain
Kasatochi	[1899 (?)]	[Unknown]	Uncertain
Okmok	1899	Unknown	Confirmed	Observations: Reported
Shishaldin	1898	Unknown	Confirmed	Observations: Reported
Shishaldin	[1897]	[Unknown]	Uncertain
Cleveland	1897	Unknown	Confirmed	Observations: Reported
Akutan	1896	Unknown	Confirmed	Observations: Reported
Akutan	1895 Aug 1	1895 Aug 14	Confirmed	Observations: Reported
Pavlof	1894	Unknown	Confirmed	Observations: Reported
Cleveland	1893	Unknown	Confirmed	Observations: Reported
Akutan	1892 Sep 23	Unknown	Confirmed	Observations: Reported
Veniaminof	1892 Aug 28	1892 Aug 30	Confirmed	Observations: Reported
Seguam	1892 Apr 15 ± 45 days	Unknown	Confirmed	Observations: Reported
Pavlof	1892	Unknown	Confirmed	Observations: Reported
Seguam	1891 Dec	Unknown	Confirmed	Observations: Reported
Akutan	1887	Unknown	Confirmed	Observations: Reported
Pavlof	1886	Unknown	Confirmed	Observations: Reported
Bogoslof	1883 Sep 27 (on or before)	1895 ± 2 years	Confirmed	Observations: Reported
Makushin	1883	Unknown	Confirmed	Observations: Reported
Akutan	1883	Unknown	Confirmed	Observations: Reported
Shishaldin	1883	Unknown	Confirmed	Observations: Reported
Shishaldin	[1880]	[1881]	Uncertain
Pavlof	1880	Unknown	Confirmed	Observations: Reported
Vsevidof	[1880]	[Unknown]	Uncertain
Vsevidof	1878	Unknown	Confirmed	Observations: Reported
Okmok	1878	Unknown	Confirmed	Observations: Reported
Amukta	1878	Unknown	Confirmed	Observations: Reported
Amukta	[1876]	[Unknown]	Uncertain
Veniaminof	1874 Jul 15 ± 45 days	Unknown	Confirmed	Observations: Reported
Semisopochnoi	1873	Unknown	Confirmed	Observations: Reported
Gareloi	1873	Unknown	Confirmed	Observations: Reported
Yunaska	[1873]	[Unknown]	Uncertain
Akutan	1867	Unknown	Confirmed	Observations: Reported
Makushin	[1867]	[Unknown]	Uncertain
Pavlof	1866 Mar 14	Unknown	Confirmed	Observations: Reported
Shishaldin	[1865]	[Unknown]	Uncertain
Makushin	1865	Unknown	Confirmed	Observations: Reported
Akutan	1865	Unknown	Confirmed	Observations: Reported
Akutan	[1862]	[Unknown]	Uncertain
Akutan	1852	Unknown	Confirmed	Observations: Reported
Pavlof	[1852]	[Unknown]	Uncertain
Veniaminof	[1852]	[Unknown]	Uncertain
Akutan	1848 Mar 5 ± 4 days	Unknown	Confirmed	Observations: Reported
Pavlof	1846 Aug	1846 Aug	Confirmed	Observations: Reported
Pavlof	1845 Aug 12	Unknown	Confirmed	Observations: Reported
Akutan	[1845]	[Unknown]	Uncertain
Makushin	[1844 ± 1 years]	[Unknown]	Uncertain
Atka Volcanic Complex	[1844]	[Unknown]	Uncertain
Shishaldin	1842	Unknown	Confirmed	Observations: Reported
Veniaminof	1838 Aug 4	1839 Apr	Confirmed	Observations: Reported
Shishaldin	1838	Unknown	Confirmed	Observations: Reported
Pavlof	1838	Unknown	Confirmed	Observations: Reported
Akutan	[1838]	[Unknown]	Uncertain
Carlisle	[1838]	[Unknown]	Uncertain
Shishaldin	1830 Nov 16 ± 15 days	1831 Mar 16 ± 15 days	Confirmed	Observations: Reported
Fisher	1830 Aug	Unknown	Confirmed	Observations: Reported
Veniaminof	[1830]	[1838]	Uncertain
Yunaska	1830	Unknown	Confirmed	Observations: Reported
Vsevidof	1830	Unknown	Confirmed	Observations: Reported
Semisopochnoi	[1830]	[Unknown]	Uncertain
Kanaga	[1829]	[Unknown]	Uncertain
Tanaga	1829	Unknown	Confirmed	Observations: Reported
Atka Volcanic Complex	[1829]	[1830]	Uncertain
Great Sitkin	[1829]	[Unknown]	Uncertain
Great Sitkin	[1828]	[Unknown]	Uncertain
Kasatochi	[1828]	[Unknown]	Uncertain
Little Sitkin	1828	1830	Confirmed	Observations: Reported
Gareloi	[1828]	[1829]	Uncertain
Carlisle	1828	Unknown	Confirmed	Observations: Reported
Akutan	[1828]	[Unknown]	Uncertain
Makushin	[1827]	[1838]	Uncertain
Kanaga	[1827]	[Unknown]	Uncertain
Kasatochi	[1827]	[Unknown]	Uncertain
Seguam	[1827]	[Unknown]	Uncertain
Shishaldin	1827	1829	Confirmed	Observations: Reported
Westdahl	1827	1830	Confirmed	Observations: Reported
Fisher	1826 Oct 11	1827 Jan (?)	Confirmed	Observations: Reported
Makushin	1826 Jun	Unknown	Confirmed	Observations: Reported
Shishaldin	1826	Unknown	Confirmed	Observations: Reported
Shishaldin	1825	Unknown	Confirmed	Observations: Reported
Pavlof	1825	Unknown	Confirmed	Observations: Reported
Shishaldin	1824	Unknown	Confirmed	Observations: Reported
Yunaska	1824	Unknown	Confirmed	Observations: Reported
Okmok	1824	1830	Confirmed	Observations: Reported
Westdahl	1820	Unknown	Confirmed	Observations: Reported
Makushin	[1818]	[Unknown]	Uncertain
Okmok	1817 Mar 1	1820	Confirmed	Observations: Reported
Vsevidof	1817	Unknown	Confirmed	Observations: Reported
Yunaska	[1817]	[Unknown]	Uncertain
Pavlof	1817	Unknown	Confirmed	Observations: Reported
Atka Volcanic Complex	1812	Unknown	Confirmed	Observations: Reported
Bogoslof	1806	1823	Confirmed	Observations: Reported
Okmok	1805	Unknown	Confirmed	Observations: Reported
Makushin	1802	Unknown	Confirmed	Observations: Reported
Bogoslof	1796 May	1804	Confirmed	Observations: Reported
Amak	1796	Unknown	Confirmed	Observations: Reported
Westdahl	1796	Unknown	Confirmed	Observations: Reported
Westdahl	1795	Unknown	Confirmed	Observations: Reported
Fisher	1795 (in or before)	Unknown	Confirmed	Observations: Reported
Great Sitkin	1792 May 26 ± 5 days	Unknown	Confirmed	Observations: Reported
Makushin	[1792 Feb 14]	[Unknown]	Uncertain
Gareloi	1792	Unknown	Confirmed	Observations: Reported
Semisopochnoi	[1792]	[Unknown]	Uncertain
Tanaga	[1791 Jun 7]	[Unknown]	Uncertain
Gareloi	1791	Unknown	Confirmed	Observations: Reported
Makushin	[1790 Jun 7]	[Unknown]	Uncertain
Vsevidof	[1790 May 30]	[Unknown]	Uncertain
Akutan	[1790]	[Unknown]	Uncertain
Gareloi	1790	Unknown	Confirmed	Observations: Reported
Semisopochnoi	[1790]	[Unknown]	Uncertain
Shishaldin	[1790]	[Unknown]	Uncertain
Pavlof	1790	Unknown	Confirmed	Observations: Reported
Amukta	1786 Jun	1791	Confirmed	Observations: Reported
Seguam	1786	1790	Confirmed	Observations: Reported
Great Sitkin	[1784]	[Unknown]	Uncertain
Vsevidof	[1784]	[Unknown]	Uncertain
Kanaga	1783 (?)	1787 (?)	Confirmed	Observations: Reported
Little Sitkin	1776	Unknown	Confirmed	Observations: Reported
Shishaldin	[1775]	[1778]	Uncertain
Carlisle	1774 Jul 2 ± 182 days	Unknown	Confirmed	Observations: Reported
Semisopochnoi	[1772]	[Unknown]	Uncertain
Amukta	[1770]	[Unknown]	Uncertain
Makushin	1768	1769	Confirmed	Observations: Reported
Kanaga	[1763]	[Unknown]	Uncertain
Tanaga	[1763]	[1770]	Uncertain
Pavlof	1762	1786	Confirmed	Unknown
Gareloi	[1760]	[Unknown]	Uncertain
Great Sitkin	[1760]	[Unknown]	Uncertain
Kasatochi	1760	Unknown	Confirmed	Observations: Reported
Amak	1700	1710	Confirmed	Observations: Reported
Takawangha	1550 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Tanaga	1550 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Akutan	1420 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Kanaga	1400 ± 50 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Kanaga	1150 ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Makushin	1150 ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Tanaga	1050 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shishaldin	0950 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Kanaga	0850 ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Akutan	0550 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Fisher	0400 ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Akutan	0340 (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Seguam	0250 ± 500 years	Unknown	Confirmed	Isotopic: Uranium-series
Kanaga	0200 ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Okmok	0100 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Makushin	0550 BCE ± 900 years	Unknown	Confirmed	Correlation: Tephrochronology
Tanaga	0550 BCE ± 2500 years	Unknown	Confirmed	Correlation: Tephrochronology
Tanaga	1050 BCE (?)	Unknown	Confirmed	Isotopic: Ar/Ar
Koniuji	1150 BCE ± 1900 years	Unknown	Confirmed	Isotopic: Ar/Ar
Kanaga	1550 BCE ± 100 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Moffett	1600 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Veniaminof	1750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Makushin	1750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Dana	1890 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Kanaga	1900 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Kanaga	2150 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Kanaga	2300 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Amak	2550 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Koniuji	2650 BCE ± 2000 years	Unknown	Confirmed	Isotopic: Ar/Ar
Fisher	3170 BCE ± 75 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Makushin	3650 BCE ± 1850 years	Unknown	Confirmed	Correlation: Tephrochronology
Moffett	3750 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)
Koniuji	3850 BCE ± 3100 years	Unknown	Confirmed	Isotopic: Ar/Ar
Seguam	4050 BCE ± 4000 years	Unknown	Confirmed	Isotopic: Uranium-series
Akutan	4150 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Kanaga	4700 BCE ± 150 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Piip	5050 BCE (?)	Unknown	Confirmed	Correlation: Tephrochronology
Seguam	5100 BCE ± 2000 years	Unknown	Confirmed	Isotopic: Uranium-series
Makushin	6100 BCE ± 50 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Okmok	6310 BCE ± 500 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Makushin	6650 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shishaldin	7050 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Seguam	7300 BCE ± 2250 years	Unknown	Confirmed	Isotopic: Ar/Ar
Kanaga	7300 BCE ± 500 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Fisher	7420 BCE ± 200 years	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Shishaldin	7550 BCE (?)	Unknown	Confirmed	Isotopic: 14C (uncalibrated)
Roundtop	7600 BCE ± 500 years	Unknown	Confirmed	Correlation: Tephrochronology
Akutan	7620 BCE ± 300 years	Unknown	Confirmed	Isotopic: 14C (calibrated)
Moffett	7850 BCE (?)	Unknown	Confirmed	Isotopic: 14C (calibrated)

There are 167 Pleistocene volcanoes in the North America Volcanic Regions.

Basin and Range Volcanic Province

Volcano Name	Country	Volcanic Landform
Golden Trout Creek	United States	Cluster
Coso Volcanic Field	United States	Cluster
Lavic Lake	United States	Cluster
Big Pine Volcanic Field	United States	Minor
Lava Mountains Volcanic Field	United States	Minor
Cima Lava Field	United States	Cluster
Amboy	United States	Minor
Pinto Basin-Salton Creek	United States	Cluster
Blackfoot Lava Field	United States	Cluster
Leucite Hills	United States	Cluster
Buffalo Valley	United States	Cluster
Aurora-Bodie	United States	Cluster
Lunar Crater	United States	Cluster
Clayton Valley	United States	Minor
Crater Flat	United States	Cluster
Sheldon-Antelope	United States	Cluster
Santa Clara	United States	Cluster
Bald Knoll	United States	Minor
Kolob	United States	Cluster
Mineral Mountains-Cove Fort	United States	Cluster
Smelter Knolls	United States	Minor
Fumarole Butte	United States	Shield
Potrillo Volcanic Field	United States	Cluster
Lucero	United States	Cluster
Taylor Volcanic Field	United States	Composite
Cat Hills	United States	Cluster
Albuquerque	United States	Cluster
Valles Caldera	United States	Caldera
Taos Plateau	United States	Cluster
Raton-Clayton	United States	Cluster
McCoy	United States	Minor
Willow Peak	United States	Minor
Sentinel Plain	United States	Cluster
Springerville Volcanic Field	United States	Cluster
San Carlos	United States	Cluster
Geronimo	United States	Cluster
Camargo Volcanic Field	Mexico	Cluster
Isla Isabel	Mexico	Minor
Ocate	United States	Cluster
Long Valley	United States	Caldera
Steamboat Springs	United States	Minor
Moctezuma Volcanic Field	Mexico	Cluster
Santo Domingo Volcanic Field	Mexico	Cluster
Ventura Volcanic Field	Mexico	Cluster
Aldama Volcanic Field	Mexico	Cluster
Los Flores	Mexico	Cluster
Jornada del Muerto	United States	Shield

Yellowstone-Snake River Hotspot Volcano Group

Volcano Name	Country	Volcanic Landform
Cerro Grande	United States	Cluster
Menan Buttes	United States	Minor
Yellowstone	United States	Caldera

High Lava Plains Volcanic Province

Volcano Name	Country	Volcanic Landform
Lava Mountain	United States	Cluster
Four Craters Lava Field	United States	Cluster
China Hat-East Butte	United States	Minor
Quartz Mountain	United States	Minor
Fort Rock Volcanic Field	United States	Cluster
Silver Creek	United States	Cluster
Saddle Butte	United States	Cluster
Lava Butte	United States	Shield
Jackies Butte	United States	Cluster
Sinker Butte	United States	Shield
Mountain Home-Kuna Lava Field	United States	Minor

California Coast Ranges Volcano Group

Volcano Name	Country	Volcanic Landform
Sutter Buttes	United States	Minor

High Cascades Volcanic Arc

Volcano Name	Country	Volcanic Landform
Tumac Mountain	United States	Minor
Goat Rocks	United States	Composite
Marble Mountain	United States	Shield
Simcoe	United States	Cluster
Boring Lava	United States	Cluster
Defiance	United States	Shield
Lost Lake Butte	United States	Shield
Wilson	United States	Shield
Olallie Butte	United States	Shield
Three Fingered Jack	United States	Shield
Black Butte	United States	Composite
Washington	United States	Shield
Black Crater	United States	Shield
Scott Mountain	United States	Shield
Tumalo	United States	Minor
Broken Top	United States	Composite
Williamson Mountain	United States	Shield
Irish Mountain	United States	Shield
Taylor Butte	United States	Shield
Cultus Mountain	United States	Shield
Wuksi Butte-Twin Lakes	United States	Cluster
Cupit Mary Mountain	United States	Shield
Fuji Mountain	United States	Shield
Maiden Peak	United States	Shield
Red Top Mountain	United States	Shield
Cowhorn Mountain	United States	Shield
Cappy Mountain	United States	Composite
Diamond Peak	United States	Shield
Thielsen	United States	Shield
Bailey	United States	Shield
Goose Nest	United States	Shield
Big Bunchgrass	United States	Minor
Imagination Peak	United States	Minor
Sprague River Valley	United States	Cluster
Pelican Butte	United States	Shield
McLoughlin	United States	Composite
Brown Mountain	United States	Shield
Mountain Lakes	United States	Cluster
Brushy Butte	United States	Shield
Twin Buttes	United States	Cluster
Silver Lake Volcanic Field	United States	Cluster
Tumble Buttes	United States	Minor
Eagle Lake Field	United States	Cluster
Copco Lake	United States	Minor
Goosenest	United States	Shield
Whaleback	United States	Shield
Rainbow Mountain	United States	Composite
Hackamore	United States	Cluster
Big Cave	United States	Shield
Cinder Butte	United States	Shield
Burney Mountain	United States	Minor
Snow Mountain	United States	Composite
Magee Peak	United States	Composite
Blacks Mountain	United States	Shield
Potato Butte	United States	Cluster
Latour Butte	United States	Minor
Caribou	United States	Cluster
Red Lake Mountain	United States	Minor
Table Mountain	United States	Composite
Black Butte	United States	Minor
Dittmar	United States	Composite
Sifford Mountain	United States	Shield
Maidu	United States	Composite
Inskip Hill	United States	Minor

Garibaldi Volcanic Arc

Volcano Name	Country	Volcanic Landform
Squamish	Canada	Cluster

Interior Western Canada Volcanic Province

Volcano Name	Country	Volcanic Landform
Satah Mountain	Canada	Cluster
Baldface Mountain	Canada	Cluster
Itcha Range	Canada	Cluster
Chilcotin Group-North	Canada	Cluster
Chilcotin Group-South	Canada	Cluster
Quesnel Cone Group	Canada	Minor

Queen Charlotte Volcano Group

Volcano Name	Country	Volcanic Landform
Addington Volcanic Field	United States	Cluster
Basalt Knob	United States	Minor

Northern Cordilleran Volcanic Province

Volcano Name	Country	Volcanic Landform
Maclaren River Volcanic Field	United States	Minor
Prindle	United States	Minor
Kawdy Metah	Canada	Cluster
Dark Mountain	Canada	Cluster
Klastline Group	Canada	Cluster
Hogum Range	Canada	Cluster
Alice Arm	Canada	Cluster

Northern Alaska-Bering Sea Volcanic Province

Volcano Name	Country	Volcanic Landform
Nunivak Island	United States	Cluster
Kookooligit Mountains	United States	Shield
St. George	United States	Cluster
Togiak Valley	United States	Cluster
Selawik Hills	United States	Cluster
Espenberg	United States	Cluster
Ingrichuak Hills	United States	Minor

Wrangell Volcanic Arc

Volcano Name	Country	Volcanic Landform
Sanford	United States	Shield
Gordon	United States	Minor
Capital	United States	Shield
Drum	United States	Composite
Tanada	United States	Shield
Jarvis	United States	Composite
Skookum Creek	United States	Cluster

Alaska Peninsula Volcanic Arc

Volcano Name	Country	Volcanic Landform
Blue Mountain	United States	Cluster
Gertrude Creek	United States	Minor
Double Glacier	United States	Minor
Jumbo Dome	United States	Minor
Devils Desk	United States	Composite
Savonovski River Cluster	United States	Composite

Aleutian Ridge Volcanic Arc

Volcano Name	Country	Volcanic Landform
Sergief	United States	Composite
Adagdak	United States	Composite
Gilbert	United States	Composite
Isanotski Peaks	United States	Composite
Trader Mountain	United States	Composite