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Sashiusudake [Baransky]

Photo of this volcano
  • Japan - administered by Russia
  • Kuril Volcanic Arc
  • Composite | Stratovolcano
  • 1951 CE
  • Country
  • Volcanic Province
  • Landform | Volc Type
  • Last Known Eruption
  • 45.1°N
  • 148.019°E

  • 1125 m
    3691 ft

  • 290080
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number


Most Recent Bulletin Report: December 1992 (BGVN 17:12) Citation IconCite this Report

1991 hydrothermal explosion near geothermal drillhole

Many hot and boiling mineralized springs are active near Baransky. Geothermal surveys have been carried out in a zone 2-4 km SW of the volcano, and a geothermal station is being built there. Temperature data from several boreholes show a strong increase in 1989, 4-5 months before the eruption of Ivan Grozny, 13 km SW. Temperatures decreased after the eruption. Gas composition (table 1), temperature, and location of fumaroles in the SW-flank explosion crater remained unchanged in 1990-91.

Table 1. Composition of gases from the Baransky area: fumaroles in the SW-flank explosion crater (samples 1-4); the bottom of the Kipyaschaya River drainage (6); geothermal drillholes (7-8). Analyses by U.A. Taran and U.A. Ignatorich. Data courtesy of G. Steinberg.

Sample 1 2 3 4 5 6 7 8
Temp. (°C) 100 99 100 101 98 61 170 47
H2O (mole %) 75.5 85.8 97.01 98.7 99.1 -- 99.94 --
Volume % of dry gas
CO2 92.45 94.20 94.20 91.20 58.24 33.00 70.0 88.0
H2S 5.71 4.60 4.51 6.00 33.0 2.2 15.1 0
SO2 0.18 0.15 -- -- -- -- -- --
H2 0.001 0.002 0.006 0.001 0.064 0.001 9.7 0.003
CH4 0.073 0.070 0.10 0.01 1.27 1.20 3.3 0.03
HCl 0.01 0 0 0 0.01 -- -- --
N2 1.22 1.18 1.20 2.10 7.43 63.0 11.0 12.0

An exploration well into a zone of hot water 4.5 km SW of the summit (in the Kipyaschaya River valley) was drilled in the summer of 1991. Drilling was temporarily halted in early August, but no casing was installed. Two weeks later, a hydrothermal explosion occurred ~50 m upslope, forming a crater >10 m in diameter. A mixture of vapor, water, and a large quantity of rock fragments was erupted for several days, destroying vegetation within 50 m. The explosion was believed to have occurred when hot water moved up the borehole after drilling ceased, and escaped through its uncased walls into a permeable fissured zone near the surface.

Information Contacts: G. Steinberg, Yuzhno-Sakhalinsk.

The Global Volcanism Program has no Weekly Reports available for Sashiusudake [Baransky].

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.

01/1988 (SEAN 13:01) Crater lake level drops; flank fumarolic activity

11/1988 (SEAN 13:11) Fumarolic activity

12/1992 (BGVN 17:12) 1991 hydrothermal explosion near geothermal drillhole




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


January 1988 (SEAN 13:01) Citation IconCite this Report

Crater lake level drops; flank fumarolic activity

During observations 4-7 October 1987, five fumaroles in an explosion crater on the SW flank were forcefully emitting vapor. Jets rose 3-5 m and had temperatures of 99-107°C. In the summit crater, a 40-m-diameter explosion crater in the lava dome contained a smaller lake than in the past. The lake was <0.2 m deep, the surface was only 10 x 15 m, and the water was cold. Weak vaporization was occurring at two points on the dome (vaporizing temperatures are 40-45°C). No fumaroles were observed but there were many areas of sulfur deposits.

Information Contacts: G. Steinberg, Yuzhno-Sakhalinsk.


November 1988 (SEAN 13:11) Citation IconCite this Report

Fumarolic activity

During an October visit to the crater, activity remained at previous levels. Fumaroles were concentrated in five groups with gas temperatures ranging from 98 to 108°C. Gas was released under pressure in four of the five groups, to 2-6 m height.

Information Contacts: G. Steinberg, Yuzhno-Sakhalinsk.


December 1992 (BGVN 17:12) Citation IconCite this Report

1991 hydrothermal explosion near geothermal drillhole

Many hot and boiling mineralized springs are active near Baransky. Geothermal surveys have been carried out in a zone 2-4 km SW of the volcano, and a geothermal station is being built there. Temperature data from several boreholes show a strong increase in 1989, 4-5 months before the eruption of Ivan Grozny, 13 km SW. Temperatures decreased after the eruption. Gas composition (table 1), temperature, and location of fumaroles in the SW-flank explosion crater remained unchanged in 1990-91.

Table 1. Composition of gases from the Baransky area: fumaroles in the SW-flank explosion crater (samples 1-4); the bottom of the Kipyaschaya River drainage (6); geothermal drillholes (7-8). Analyses by U.A. Taran and U.A. Ignatorich. Data courtesy of G. Steinberg.

Sample 1 2 3 4 5 6 7 8
Temp. (°C) 100 99 100 101 98 61 170 47
H2O (mole %) 75.5 85.8 97.01 98.7 99.1 -- 99.94 --
Volume % of dry gas
CO2 92.45 94.20 94.20 91.20 58.24 33.00 70.0 88.0
H2S 5.71 4.60 4.51 6.00 33.0 2.2 15.1 0
SO2 0.18 0.15 -- -- -- -- -- --
H2 0.001 0.002 0.006 0.001 0.064 0.001 9.7 0.003
CH4 0.073 0.070 0.10 0.01 1.27 1.20 3.3 0.03
HCl 0.01 0 0 0 0.01 -- -- --
N2 1.22 1.18 1.20 2.10 7.43 63.0 11.0 12.0

An exploration well into a zone of hot water 4.5 km SW of the summit (in the Kipyaschaya River valley) was drilled in the summer of 1991. Drilling was temporarily halted in early August, but no casing was installed. Two weeks later, a hydrothermal explosion occurred ~50 m upslope, forming a crater >10 m in diameter. A mixture of vapor, water, and a large quantity of rock fragments was erupted for several days, destroying vegetation within 50 m. The explosion was believed to have occurred when hot water moved up the borehole after drilling ceased, and escaped through its uncased walls into a permeable fissured zone near the surface.

Information Contacts: G. Steinberg, Yuzhno-Sakhalinsk.

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 3 confirmed Holocene eruptive periods.

1951 Jul 15 ± 45 days Confirmed Eruption Max VEI: 1

Episode 1 | Eruption Episode
1951 Jul 15 ± 45 days - Unknown Evidence from Observations: Reported

List of 2 Events for Episode 1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
1951 Jul 15 ± 45 days    - - - - VEI (Explosivity Index)

1570 ± 30 years Confirmed Eruption  

Episode 1 | Eruption Episode
1570 ± 30 years - Unknown Evidence from Isotopic: 14C (uncalibrated)

1460 ± 30 years Confirmed Eruption  

Episode 1 | Eruption Episode
1460 ± 30 years - Unknown Evidence from Isotopic: 14C (uncalibrated)
Deformation History

There is no Deformation History data available for Sashiusudake [Baransky].

Emission History

There is no Emissions History data available for Sashiusudake [Baransky].

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 Sashiusudake [Baransky] in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites