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Pavlof Sister

Photo of this volcano
  • United States
  • Alaska
  • Stratovolcano
  • Unknown - Evidence Credible
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 55.457°N
  • 161.854°W

  • 2142 m
    7028 ft

  • 312040
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Pavlof Sister.

The Global Volcanism Program has no Weekly Reports available for Pavlof Sister.

The Global Volcanism Program has no Bulletin Reports available for Pavlof Sister.

The Global Volcanism Program has no synonyms or subfeatures listed for Pavlof Sister.

Eruptive History

The Global Volcanism Program is not aware of any Holocene eruptions from Pavlof Sister. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Pavlof Sister page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

Deformation History

There is no Deformation History data available for Pavlof Sister.

Emission History

There is no Emissions History data available for Pavlof Sister.

Photo Gallery

An ash plume trails to the south in mid-July 1986, 3 months after the start of an eruption of Pavlof that lasted nearly 2 1/2 years. This photo was taken from the west on a fishing boat in Pavlof Bay, with Pavlof Sister to the right. The 1986-88 eruption produced intermittent ashfalls and lava flows from two vents near the summit, one halfway down the SE flank, and another 600 m below the summit on the NE flank. Lava flows traveled to the north, NE, SE, ESE, and SSE, the latter to within 600 m of the Pavlof Bay shoreline.

Photo by Richard Mack, 1986.
See title for photo information.
The twin volcanoes of Pavlof (left) and Pavlof Sister (right) rise to 2519 m and 2142 m, respectively. This January 20, 1987, view from the SW shows steam clouds rising along the length of a lava flow descending a prominent gully on the SE (right-hand) flank of Pavlof volcano. Recent snowfall covers ashfall that frequently dusted its slopes. This eruption began with explosive activity on April 16, 1986, and continued until August 13, 1988. Lava flows traveled down the north, NE, SE, ESE, and SSE flanks, the latter reaching to within 600 m of Pavlof Bay.

Photo by Jerry Chisum (Mark Air), 1987 (courtesy of John Reeder, Alaska Div. Geology Geophysical Surveys).
See title for photo information.
The summits of the twin volcanoes of Pavlof Sister (left) and Pavlof (right) rise to 2142 m and 2519 m, respectively, above a low, roughly 1100-m-high saddle. They are viewed here in 1975 from lowlands to the NW. The somewhat less eroded Pavlof volcano, its slopes darkened by recent ashfalls, has been the source of frequent eruptions in historical time. Little Pavlof, a small satellitic volcano on the right flank of Pavlof, was also constructed along a line of vents trending NE from Emmons Lake caldera.

Photo by Tom Miller, 1975 (U.S. Geological Survey, Alaska Volcano Observatory).
See title for photo information.
Pavlof volcano, rising above low plains to its NW, is one of Alaska's most active volcanoes. It is part of a NNE-SSW-trending line of volcanoes near the tip of the Alaskan Peninsula. The knob on the middle right horizon is Little Pavlof, a subsidiary peak of Pavlof. The low saddle at the left separates Pavlof from Pavlof Sister, whose lower flanks are seen at the extreme left.

Photo by Steve McNutt, 1979 (University of Alaska, Alaska Volcano Observatory).
See title for photo information.
A small puff of dark ash rises from the summit crater of Pavlof volcano on May 28, 1960, as the detached plume from an earlier explosion drifts away to the east. Ash blankets the slopes of Pavlof in this view from the north. Mild ash eruptions took place from Pavlof from about 1960 to 1963, especially during July 1962 to June 1963. The sharp-topped peak at the left is snow-covered Pavlof Sister volcano, and Little Pavlof forms the smaller peak to the right of Pavlof.

Photo by Ken Morin, 1960 (courtesy of Bill Rose, Michigan Technological University).
See title for photo information.
GVP Map Holdings

The maps shown below have been scanned from the GVP map archives and include the volcano on this page. Clicking on the small images will load the full 300 dpi map. Very small-scale maps (such as world maps) are not included. The maps database originated over 30 years ago, but was only recently updated and connected to our main database. We welcome users to tell us if they see incorrect information or other problems with the maps; please use the Contact GVP link at the bottom of the page to send us email.

Title: Cold Bay
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1987
Series: Sectional Aero Chart
Map Type: Topographic
Scale: 1:500,000
Map of Cold Bay
Title: United States
Publisher: DMA Aerospace Center
Country: United States
Year: 1987
Series: ONC
Map Type: Topographic
Scale: 1:1,000,000
Map of United States
Title: Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Publisher: US Geological Survey
Country: United States
Year: 1986
Series: Misc Investigations
Map Type: Geology
Scale: 1:1,000,000
Map of Map Showing Distribution, Composition, and Age of Late Cenozoic Volcanic Craters in Alaska
Title: Saint George Basin Regional Map
Publisher: USDI Minerals Management Service
Country: United States
Year: 1984
Series: OCSRM maps
Map Type: Bathymetric
Scale: 1:1,000,000
Map of Saint George Basin Regional Map
Title: N Aleutian Basin, Gulf of AK
Publisher: USDI Minerals Management Service
Country: United States
Year: 1984
Series: OCSRM maps
Map Type: Bathymetric
Scale: 1:1,000,000
Map of N Aleutian Basin, Gulf of AK
Title: False Pass
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1984
Map Type: Bathymetric
Scale: 1:250,000
Map of False Pass
Title: Stepovak Bay, AK Peninsula
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1984
Map Type: Bathymetric
Scale: 1:250,000
Map of Stepovak Bay, AK Peninsula
Title: N Pacific Ocean, NOS Seamount Series
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1973
Map Type: Bathymetric
Scale: 1:1,000,000
Map of N Pacific Ocean, NOS Seamount Series
Title: Magnetic Map of N Pacific Ocean
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1973
Series: Seamap
Map Type: Geophysical (Magnetic)
Scale: 1:1,000,000
Map of Magnetic Map of N Pacific Ocean
Title: Gravity Map of N Pacific Ocean
Publisher: US Department of Commerce, NOAA National Ocean Service
Country: United States
Year: 1973
Series: Seamap
Map Type: Geophysical (Gravity)
Scale: 1:1,000,000
Map of Gravity Map of N Pacific Ocean
Title: False Pass
Publisher: US Geological Survey
Country: United States
Year: 1956
Series: AK Recon Topo 250
Map Type: Topographic
Scale: 1:250,000
Map of False Pass
Title: Pavlof Volcano & Vicinity, Geol Map of
Publisher: US Geological Survey
Country: United States
Year: 1955
Series: B
Map Type: Geology
Scale: 1:100,000
Map of Pavlof Volcano & Vicinity, Geol Map of
Title: Port Moller
Publisher: US Geological Survey
Country: United States
Year: 1953
Series: AK Recon Topo 250
Map Type: Topographic
Scale: 1:250,000
Map of Port Moller
Title: Fort Randall
Publisher: US Geological Survey
Country: United States
Year: 1943
Series: AK Recon Topo 250
Map Type: Geographic
Scale: 1:250,000
Map of Fort Randall
Smithsonian Sample Collections Database

There are no samples for Pavlof Sister in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

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