Yakedake

Photo of this volcano
  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 36.227°N
  • 137.587°E

  • 2455 m
    8052 ft

  • 283070
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

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.

The Global Volcanism Program has no Weekly Reports available for Yakedake.

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.

Eruptive History


Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).


Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1995 Feb 11 1995 Feb 11 Confirmed 1 Historical Observations SE flank (Azusa-gawa)
1962 Jun 17 1963 Jun 29 Confirmed 2 Historical Observations North flank (Kurodani and Nakao-toge)
1939 Jun 4 1939 Jun 4 Confirmed 2 Historical Observations
1935 Sep 11 1935 Nov 12 Confirmed 2 Historical Observations
1932 Feb 6 1932 Feb 6 Confirmed 2 Historical Observations
1931 Mar 26 1931 Jun 24 Confirmed 2 Historical Observations
1930 Mar 13 1930 May 11 (?) Confirmed 2 Historical Observations Inkyo-ko
1929 Apr 17 1929 Apr 19 Confirmed 2 Historical Observations Summit (Inkyo-ko), NW flank (Kurodani)
1927 Dec 15 1927 Dec 15 Confirmed 2 Historical Observations Summit (Inkyo-ko), NW flank (Kurodani)
1927 Jan 23 1927 Apr 29 Confirmed 2 Historical Observations Summit (Inkyo-ko), NW flank (Kurodani)
1924 Nov 16 1926 Jan 27 Confirmed 2 Historical Observations Summit (Inkyo-ko), NW flank (Kurodani)
1923 Jun 26 1923 Aug 2 Confirmed 2 Historical Observations NW flank (Kurodani Crater), Inkyo-ko
1922 Mar 10 1922 Mar 19 Confirmed 1 Historical Observations NW flank (Kurodani Crater), Inkyo-ko
1921 Unknown Confirmed   Historical Observations
1920 Unknown Confirmed   Historical Observations
1919 Nov 1 1919 Nov 1 Confirmed 2 Historical Observations NW flank (Kurodani Crater)
1918 Unknown Confirmed 1 Historical Observations Taisho crater
1917 Unknown Confirmed 1 Historical Observations Taisho Crater
1916 Mar 17 1916 Apr 12 (?) Confirmed 2 Historical Observations Taisho Crater, Inkyo-ko
1915 Jun 6 1915 Jul 16 Confirmed 2 Historical Observations 1911 summit crater, SE flank (Taisho)
1915 Feb 1915 Feb Confirmed 2 Historical Observations
1913 Sep 1 (?) 1914 Jan 13 Confirmed 2 Historical Observations Inkyo-ko
1912 Feb 11 1912 Sep (?) Confirmed 2 Historical Observations
1911 May 6 1911 Aug 23 (?) Confirmed 2 Historical Observations New summit crater (Inkyo-ko)
1910 Nov 11 1910 Nov 30 Confirmed 2 Historical Observations Summit crater (Shoga-ike)
1907 Dec 8 1909 Jun 1 Confirmed 2 Historical Observations Summit crater (Shoga-ike)
1746 Apr 18 1746 Apr 19 Confirmed 2 Historical Observations Ykd-Tu7 tephra
1585 Dec (?) Unknown Confirmed 3 Historical Observations Ykd-Tu6 tephra
1460 (?) Unknown Confirmed 2 Tephrochronology Ykd-Tu5 tephra
1440 (?) Unknown Confirmed   Tephrochronology Ykd-Tu4 tephra
1270 (?) Unknown Confirmed   Tephrochronology Ykd-Tu3 tephra
0686 Unknown Confirmed 2 Historical Observations Ykd-Tu2 tephra
0630 (?) Unknown Confirmed 1 Tephrochronology Ykd-Tu1 tephra
0350 BCE (?) Unknown Confirmed 4 Radiocarbon (corrected)
0400 BCE (?) Unknown Confirmed   Tephrochronology Ykd-Tl2 tephra
0850 BCE (?) Unknown Confirmed   Tephrochronology Ykd-Tl1 tephra
2550 BCE (?) Unknown Confirmed 0 Tephrochronology
7450 BCE (?) Unknown Confirmed 0 Tephrochronology Akandana-yama

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.

Photo Gallery


Yake-dake, whose name means "Burning Mountain," rises above the popular resort of Kamikochi in the Northern Japan Alps. It is seen here from Taisho-ike pond to its ENE. The small andesitic stratovolcano contains a 300-m-wide crater at its summit, and explosion craters are found on the SE and northern flanks. Frequent small-to-moderate phreatic eruptions have occurred during the 20th century from both summit and flank vents. An eruption in 1915 produced a mudflow that created Taisho-ike pond and killed the trees in the foreground.

Photo by Lee Siebert, 1977 (Smithsonian Institution).
See title for photo information.
A mudflow during an eruption of Yake-dake volcano in 1915 dammed the Azusa-gawa river, forming the Taisho-ike pond, and leaving these standing dead trees. The 1915 eruption began on June 6 from a 1-km-long fissure that extended from the summit down the ESE flank. About 50 craters opened along the fissure, but the principal activity took place from the upper end of the fissure.

Photo by Lee Siebert (Smithsonian Institution).
See title for photo information.

Smithsonian Sample Collections Database


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

Affiliated Sites