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Hakkodasan

Photo of this volcano
  • Japan
  • Stratovolcano(es)
  • 1550 CE
  •  
  • Country
  • Primary Volcano Type
  • Last Known Eruption
  •  
  • 40.659°N
  • 140.877°E

  • 1585 m
    5200 ft

  • 283280
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

Most Recent Bulletin Report: June 1997 (BGVN 22:06) Citation IconCite this Report

Volcanogenic carbon dioxide kills soldiers in a topographic depression

On 14 July press reports noted that a party of the Ground Self Defense Force (Japanese army) on a training mission at the N foot of Hakkoda volcano without gas masks accidentally inhaled dangerous gases. In the darkness, some members of the party slipped into a depression (18 m long, 11 m wide, and 8 m deep), as did those who first tried to rescue them. The men were hospitalized on the evening of 12 July, but three lost their lives. There were no plants within the depression, and leaves on plants around it were dead. The fire station of the Aomori Prefecture mentioned that many holes and depressions emitting sulfurous acidic gases were located around this volcano. Local farmers reported dead animals in these depressions.

According to J. Hirabayashi, who inspected the depression on 13 July, its gases contained as much as 15-20 volume percent CO2 (much higher than the normal value of 0.035%), but no hydrogen sulfide. Delta 13C values were -5.7 for CO2 in the gas from the depression collected on 13 July, -6.1 for CO2 dissolved in water samples from the Hakkoda hotsprings, and -6.0 in the springwater from near the depression, collected on 14 July. These results indicated a magmatic origin for the CO2-rich gas because delta 13C of CO2 in volcanic gas in Japan ranges from -10 to 0 , whereas that in CO2 gas of organic origin ranges from -30 to -20 .

Information Contacts: Takeshi Ohba and Jun-ichi Hirabayashi, Tokyo Institute of Technology, 2-12-1 O-okayama,Meguro-ku, Tokyo 152, Japan; Setsuya Nakada, Volcano Research Center, Earthquake Research Institute, University of Tokyo, Yayoi 1-1- 1, Bunkyo-ku, Tokyo 113, Japan (URL: http://www.eri.u-tokyo.ac.jp/VRC/index_E.html).

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

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.

06/1997 (BGVN 22:06) Volcanogenic carbon dioxide kills soldiers in a topographic depression




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


June 1997 (BGVN 22:06) Citation IconCite this Report

Volcanogenic carbon dioxide kills soldiers in a topographic depression

On 14 July press reports noted that a party of the Ground Self Defense Force (Japanese army) on a training mission at the N foot of Hakkoda volcano without gas masks accidentally inhaled dangerous gases. In the darkness, some members of the party slipped into a depression (18 m long, 11 m wide, and 8 m deep), as did those who first tried to rescue them. The men were hospitalized on the evening of 12 July, but three lost their lives. There were no plants within the depression, and leaves on plants around it were dead. The fire station of the Aomori Prefecture mentioned that many holes and depressions emitting sulfurous acidic gases were located around this volcano. Local farmers reported dead animals in these depressions.

According to J. Hirabayashi, who inspected the depression on 13 July, its gases contained as much as 15-20 volume percent CO2 (much higher than the normal value of 0.035%), but no hydrogen sulfide. Delta 13C values were -5.7 for CO2 in the gas from the depression collected on 13 July, -6.1 for CO2 dissolved in water samples from the Hakkoda hotsprings, and -6.0 in the springwater from near the depression, collected on 14 July. These results indicated a magmatic origin for the CO2-rich gas because delta 13C of CO2 in volcanic gas in Japan ranges from -10 to 0 , whereas that in CO2 gas of organic origin ranges from -30 to -20 .

Information Contacts: Takeshi Ohba and Jun-ichi Hirabayashi, Tokyo Institute of Technology, 2-12-1 O-okayama,Meguro-ku, Tokyo 152, Japan; Setsuya Nakada, Volcano Research Center, Earthquake Research Institute, University of Tokyo, Yayoi 1-1- 1, Bunkyo-ku, Tokyo 113, Japan (URL: http://www.eri.u-tokyo.ac.jp/VRC/index_E.html).

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 7 confirmed Holocene eruptive periods.

1550 ± 100 years Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode SW flank of O-dake (Jigoku-numa)
1550 ± 100 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 3 Events for Episode 1 at SW flank of O-dake (Jigoku-numa)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity weak or small
1550 ± 100 years    - - - - VEI (Explosivity Index)
1997 Jul 12    - - - - Fatalities

1340 ± 75 years Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode SW flank of O-dake (Jigoku-numa)
1340 ± 75 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 2 Events for Episode 1 at SW flank of O-dake (Jigoku-numa)

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity weak or small
1340 ± 75 years    - - - - VEI (Explosivity Index)

0450 (?) Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode O-dake, Hk-1 tephra
0450 (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 3 Events for Episode 1 at O-dake, Hk-1 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
0450
(?)
   - - - - VEI (Explosivity Index)

0050 BCE (?) Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode O-dake, Hk-2 tephra
0050 BCE (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 3 Events for Episode 1 at O-dake, Hk-2 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
0050 BCE
(?)
   - - - - VEI (Explosivity Index)

1150 BCE (?) Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode O-dake, Hk-3 tephra
1150 BCE (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 3 Events for Episode 1 at O-dake, Hk-3 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Ash
1150 BCE
(?)
   - - - - VEI (Explosivity Index)

2250 BCE (?) Confirmed Eruption Max VEI: 3

Episode 1 | Eruption Episode O-dake, Hk-4 tephra
2250 BCE (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 4 Events for Episode 1 at O-dake, Hk-4 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
2250 BCE
(?)
   - - - - VEI (Explosivity Index)

2850 BCE (?) Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode O-dake, Hk-5 tephra
2850 BCE (?) - Unknown Evidence from Isotopic: 14C (calibrated)

List of 4 Events for Episode 1 at O-dake, Hk-5 tephra

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatic activity
   - - - -    - - - - Ash
2850 BCE
(?)
   - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for Hakkodasan.

Emission History

There is no Emissions History data available for Hakkodasan.

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.

Smithsonian Sample Collections Database

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

External Sites