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Yakedake

Photo of this volcano
  • Country
  • Volcanic Region
  • Landform | Volc Type
  • Last Known Eruption
  • 36.227°N
  • 137.587°E

  • 2,455 m
    8,054 ft

  • 283070
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Weekly Report: 6 July-12 July 2022 Citation IconCite this Report

JMA reported that after an increase in the number of small volcanic earthquakes with epicenters near Yakedake’s summit in late May, seismicity remained elevated for a few weeks. Seismicity decreased in mid-June and returned to baseline levels. The Alert Level was lowered to 1 (on a scale of 1-5) on 12 July.

Source: Japan Meteorological Agency (JMA)


Most Recent Bulletin Report: February 1995 (BGVN 20:02) Citation IconCite this Report

Hydrothermal explosion kills four people

A hydrothermal explosion around 1430 on 11 February killed four people at a highway construction site, located in a geothermal area along the narrow Azusa-gawa River ~2 km SE of the summit. The Geological Survey of Japan reported that there were at least two explosions from the vent (12 m long and 6 m wide). The first, a large explosion, created a 1,500-m-high plume composed of mud and gas, and caused collapse of the river bank, burying the primary vent. A second explosion scattered mud and gas within 200 m of the vent. JMA staff who surveyed the site on 12 February and 13 March noted that fume rising to a height of 20 m was almost at the boiling point. No explosions have been reported since 12 February.

Information Contacts: JMA.

Weekly Reports - Index


2022: May | July


6 July-12 July 2022 Citation IconCite this Report

JMA reported that after an increase in the number of small volcanic earthquakes with epicenters near Yakedake’s summit in late May, seismicity remained elevated for a few weeks. Seismicity decreased in mid-June and returned to baseline levels. The Alert Level was lowered to 1 (on a scale of 1-5) on 12 July.

Source: Japan Meteorological Agency (JMA)


25 May-31 May 2022 Citation IconCite this Report

JMA raised the Alert Level for Yakedake to 2 (on a scale of 1-5) on 24 May, noting that the number of small volcanic earthquakes with epicenters near the summit began increasing around 2300 the day before. The report also noted that minor inflation near the summit was continuing. Daily small volcanic earthquakes continued to be counted through 31 May.

Source: Japan Meteorological Agency (JMA)


Bulletin Reports - Index

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

02/1995 (BGVN 20:02) Hydrothermal explosion kills four people




Information is preliminary and subject to change. All times are local (unless otherwise noted)


February 1995 (BGVN 20:02) Citation IconCite this Report

Hydrothermal explosion kills four people

A hydrothermal explosion around 1430 on 11 February killed four people at a highway construction site, located in a geothermal area along the narrow Azusa-gawa River ~2 km SE of the summit. The Geological Survey of Japan reported that there were at least two explosions from the vent (12 m long and 6 m wide). The first, a large explosion, created a 1,500-m-high plume composed of mud and gas, and caused collapse of the river bank, burying the primary vent. A second explosion scattered mud and gas within 200 m of the vent. JMA staff who surveyed the site on 12 February and 13 March noted that fume rising to a height of 20 m was almost at the boiling point. No explosions have been reported since 12 February.

Information Contacts: JMA.

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.

Eruptive History

There is data available for 38 confirmed Holocene eruptive periods.

1995 Feb 11 - 1995 Feb 11 Confirmed Eruption VEI: 1

Episode 1 | Eruption SE flank (Azusa-gawa)
1995 Feb 11 - 1995 Feb 11 Evidence from Observations: Reported

List of 6 Events for Episode 1 at SE flank (Azusa-gawa)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Avalanche weak or small
   - - - -    - - - - Blocks
   - - - -    - - - - Property Damage
1995 Feb 11    - - - - Fatalities
1995 Feb 11    - - - - VEI (Explosivity Index)

1962 Jun 17 - 1963 Jun 29 Confirmed Eruption VEI: 2

Episode 1 | Eruption North flank (Kurodani and Nakao-toge)
1962 Jun 17 - 1963 Jun 29 Evidence from Observations: Reported

List of 7 Events for Episode 1 at North flank (Kurodani and Nakao-toge)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Blocks
   - - - -    - - - - Earthquakes (undefined) Before.
   - - - -    - - - - Lahar or Mudflow
   - - - -    - - - - Property Damage
1962 Jun 17    - - - - VEI (Explosivity Index)

1939 Jun 4 - 1939 Jun 4 Confirmed Eruption VEI: 2

Episode 1 | Eruption
1939 Jun 4 - 1939 Jun 4 Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1939 Jun 4    - - - - VEI (Explosivity Index)

1935 Sep 11 - 1935 Nov 12 Confirmed Eruption VEI: 2

Episode 1 | Eruption
1935 Sep 11 - 1935 Nov 12 Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1935 Sep 11    - - - - VEI (Explosivity Index)

1932 Feb 6 - 1932 Feb 6 Confirmed Eruption VEI: 2

Episode 1 | Eruption
1932 Feb 6 - 1932 Feb 6 Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1932 Feb 6    - - - - VEI (Explosivity Index)

1931 Mar 26 - 1931 Jun 24 Confirmed Eruption VEI: 2

Episode 1 | Eruption
1931 Mar 26 - 1931 Jun 24 Evidence from Observations: Reported

List of 4 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Property Damage
1931 Mar 26    - - - - VEI (Explosivity Index)

1930 Mar 13 - 1930 May 11 (?) Confirmed Eruption VEI: 2

Episode 1 | Eruption Inkyo-ko
1930 Mar 13 - 1930 May 11 (?) Evidence from Observations: Reported

List of 3 Events for Episode 1 at Inkyo-ko

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Earthquakes (undefined) Before.
1930 Mar 13    - - - - VEI (Explosivity Index)

1929 Apr 17 - 1929 Apr 19 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit (Inkyo-ko), NW flank (Kurodani)
1929 Apr 17 - 1929 Apr 19 Evidence from Observations: Reported

List of 3 Events for Episode 1 at Summit (Inkyo-ko), NW flank (Kurodani)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1929 Apr 17    - - - - VEI (Explosivity Index)

1927 Dec 15 - 1927 Dec 15 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit (Inkyo-ko), NW flank (Kurodani)
1927 Dec 15 - 1927 Dec 15 Evidence from Observations: Reported

List of 3 Events for Episode 1 at Summit (Inkyo-ko), NW flank (Kurodani)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1927 Dec 15    - - - - VEI (Explosivity Index)

1927 Jan 23 - 1927 Apr 29 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit (Inkyo-ko), NW flank (Kurodani)
1927 Jan 23 - 1927 Apr 29 Evidence from Observations: Reported

List of 4 Events for Episode 1 at Summit (Inkyo-ko), NW flank (Kurodani)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Earthquakes (undefined) Before.
1927 Jan 23    - - - - VEI (Explosivity Index)

1924 Nov 16 - 1926 Jan 27 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit (Inkyo-ko), NW flank (Kurodani)
1924 Nov 16 - 1926 Jan 27 Evidence from Observations: Reported

List of 8 Events for Episode 1 at Summit (Inkyo-ko), NW flank (Kurodani)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Eruption cloud
   - - - -    - - - - Ash
   - - - -    - - - - Blocks
   - - - -    - - - - Lightning
   - - - -    - - - - Crater Summit.
   - - - -    - - - - Crater Parasitic.
1924 Nov 16    - - - - VEI (Explosivity Index)

1923 Jun 26 - 1923 Aug 2 Confirmed Eruption VEI: 2

Episode 1 | Eruption NW flank (Kurodani Crater), Inkyo-ko
1923 Jun 26 - 1923 Aug 2 Evidence from Observations: Reported

List of 3 Events for Episode 1 at NW flank (Kurodani Crater), Inkyo-ko

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1923 Jun 26    - - - - VEI (Explosivity Index)

1922 Mar 10 - 1922 Mar 19 Confirmed Eruption VEI: 1 (?)

Episode 1 | Eruption NW flank (Kurodani Crater), Inkyo-ko
1922 Mar 10 - 1922 Mar 19 Evidence from Observations: Reported

List of 3 Events for Episode 1 at NW flank (Kurodani Crater), Inkyo-ko

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1922 Mar 10    - - - - VEI (Explosivity Index)

1921 Confirmed Eruption  

Episode 1 | Eruption
1921 - Unknown Evidence from Observations: Reported

List of 1 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity

1920 Confirmed Eruption  

Episode 1 | Eruption
1920 - Unknown Evidence from Observations: Reported

List of 1 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity

1919 Nov 1 - 1919 Nov 1 Confirmed Eruption VEI: 2

Episode 1 | Eruption NW flank (Kurodani Crater)
1919 Nov 1 - 1919 Nov 1 Evidence from Observations: Reported

List of 2 Events for Episode 1 at NW flank (Kurodani Crater)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
1919 Nov 1    - - - - VEI (Explosivity Index)

1918 Confirmed Eruption VEI: 1

Episode 1 | Eruption Taisho crater
1918 - Unknown Evidence from Observations: Reported

List of 2 Events for Episode 1 at Taisho crater

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
1918    - - - - VEI (Explosivity Index)

1917 Confirmed Eruption VEI: 1

Episode 1 | Eruption Taisho Crater
1917 - Unknown Evidence from Observations: Reported

List of 2 Events for Episode 1 at Taisho Crater

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
1917    - - - - VEI (Explosivity Index)

1916 Mar 17 - 1916 Apr 12 (?) Confirmed Eruption VEI: 2

Episode 1 | Eruption Taisho Crater, Inkyo-ko
1916 Mar 17 - 1916 Apr 12 (?) Evidence from Observations: Reported

List of 3 Events for Episode 1 at Taisho Crater, Inkyo-ko

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1916 Mar 17    - - - - VEI (Explosivity Index)

1915 Jun 6 - 1915 Jul 16 Confirmed Eruption VEI: 2

Episode 1 | Eruption 1911 summit crater, SE flank (Taisho)
1915 Jun 6 - 1915 Jul 16 Evidence from Observations: Reported

List of 7 Events for Episode 1 at 1911 summit crater, SE flank (Taisho)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Blocks
   - - - -    - - - - Earthquakes (undefined) Before.
   - - - -    - - - - Lahar or Mudflow
   - - - -    - - - - Property Damage
1915 Jun 6    - - - - VEI (Explosivity Index)

1915 Feb - 1915 Feb Confirmed Eruption VEI: 2 (?)

Episode 1 | Eruption
1915 Feb - 1915 Feb Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Ash
1915 Feb    - - - - VEI (Explosivity Index)

1913 Sep 1 (?) - 1914 Jan 13 Confirmed Eruption VEI: 2

Episode 1 | Eruption Inkyo-ko
1913 Sep 1 (?) - 1914 Jan 13 Evidence from Observations: Reported

List of 4 Events for Episode 1 at Inkyo-ko

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Audible Sounds
1913 Sep 1
(?)
   - - - - VEI (Explosivity Index)

1912 Feb 11 - 1912 Sep (?) Confirmed Eruption VEI: 2

Episode 1 | Eruption
1912 Feb 11 - 1912 Sep (?) Evidence from Observations: Reported

List of 3 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1912 Feb 11    - - - - VEI (Explosivity Index)

1911 May 6 - 1911 Aug 23 (?) Confirmed Eruption VEI: 2

Episode 1 | Eruption New summit crater (Inkyo-ko)
1911 May 6 - 1911 Aug 23 (?) Evidence from Observations: Reported

List of 5 Events for Episode 1 at New summit crater (Inkyo-ko)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Flames
1911 May 6    - - - - VEI (Explosivity Index)

1910 Nov 11 - 1910 Nov 30 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit crater (Shoga-ike)
1910 Nov 11 - 1910 Nov 30 Evidence from Observations: Reported

List of 4 Events for Episode 1 at Summit crater (Shoga-ike)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
   - - - -    - - - - Audible Sounds
1910 Nov 11    - - - - VEI (Explosivity Index)

1907 Dec 8 - 1909 Jun 1 Confirmed Eruption VEI: 2

Episode 1 | Eruption Summit crater (Shoga-ike)
1907 Dec 8 - 1909 Jun 1 Evidence from Observations: Reported

List of 3 Events for Episode 1 at Summit crater (Shoga-ike)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1907 Dec 8    - - - - VEI (Explosivity Index)

1746 Apr 18 - 1746 Apr 19 Confirmed Eruption VEI: 2

Episode 1 | Eruption Ykd-Tu7 tephra
1746 Apr 18 - 1746 Apr 19 Evidence from Observations: Reported

List of 3 Events for Episode 1 at Ykd-Tu7 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1746 Apr 18    - - - - VEI (Explosivity Index)

1585 Dec (?) Confirmed Eruption VEI: 3

Episode 1 | Eruption Ykd-Tu6 tephra
1585 Dec (?) - Unknown Evidence from Observations: Reported

List of 5 Events for Episode 1 at Ykd-Tu6 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Earthquakes (undefined) Uncertain
   - - - -    - - - - Lahar or Mudflow
   - - - -    - - - - Property Damage
1585 Dec
(?)
   - - - - VEI (Explosivity Index)

1460 (?) Confirmed Eruption VEI: 2

Episode 1 | Eruption Ykd-Tu5 tephra
1460 (?) - Unknown Evidence from Correlation: Tephrochronology

List of 3 Events for Episode 1 at Ykd-Tu5 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
1460
(?)
   - - - - VEI (Explosivity Index)

1440 (?) Confirmed Eruption  

Episode 1 | Eruption Ykd-Tu4 tephra
1440 (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1 at Ykd-Tu4 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash

1270 (?) Confirmed Eruption  

Episode 1 | Eruption Ykd-Tu3 tephra
1270 (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1 at Ykd-Tu3 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash

0686 Confirmed Eruption VEI: 2

Episode 1 | Eruption Ykd-Tu2 tephra
0686 - Unknown Evidence from Observations: Reported

List of 3 Events for Episode 1 at Ykd-Tu2 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
0686    - - - - VEI (Explosivity Index)

0630 (?) Confirmed Eruption VEI: 1

Episode 1 | Eruption Ykd-Tu1 tephra
0630 (?) - Unknown Evidence from Correlation: Tephrochronology

List of 3 Events for Episode 1 at Ykd-Tu1 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
0630
(?)
   - - - - VEI (Explosivity Index)

0350 BCE (?) Confirmed Eruption VEI: 4

Episode 1 | Eruption
0350 BCE (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 5 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Pyroclastic flow
   - - - -    - - - - Lava flow
0350 BCE
(?)
   - - - - VEI (Explosivity Index)

0400 BCE (?) Confirmed Eruption  

Episode 1 | Eruption Ykd-Tl2 tephra
0400 BCE (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1 at Ykd-Tl2 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash

0850 BCE (?) Confirmed Eruption  

Episode 1 | Eruption Ykd-Tl1 tephra
0850 BCE (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1 at Ykd-Tl1 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatic activity

2550 BCE (?) Confirmed Eruption VEI: 0

Episode 1 | Eruption
2550 BCE (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Lava flow
2550 BCE
(?)
   - - - - VEI (Explosivity Index)

7450 BCE (?) Confirmed Eruption VEI: 0

Episode 1 | Eruption Akandana-yama
7450 BCE (?) - Unknown Evidence from Correlation: Tephrochronology

List of 2 Events for Episode 1 at Akandana-yama

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Lava flow
7450 BCE
(?)
   - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for Yakedake.

Emission History

There is no Emissions History data available for Yakedake.

GVP Map Holdings

Maps are not currently available due to technical issues.

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.

Smithsonian Sample Collections Database

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

External Sites