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Mashu

Photo of this volcano
  • Japan
  • Kuril Volcanic Arc
  • Caldera | Caldera
  • 1080 CE
  • Country
  • Volcanic Province
  • Landform | Volc Type
  • Last Known Eruption
  • 43.572°N
  • 144.561°E

  • 857 m
    2812 ft

  • 285081
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports available for Mashu.

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

The Global Volcanism Program has no Bulletin Reports available for Mashu.

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.

1080 ± 100 years Confirmed Eruption Max VEI: 5

Episode 1 | Eruption Episode Kamuinupuri, Tephra layer Ma-b
1080 ± 100 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 4 Events for Episode 1 at Kamuinupuri, Tephra layer Ma-b

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Pumice
   - - - -    - - - - Caldera Explosion
1080 ± 100 years    - - - - VEI (Explosivity Index)

0350 ± 100 years Confirmed Eruption Max VEI: 2

Episode 1 | Eruption Episode Kamuinupuri, Tephra layer Ma-c1
0350 ± 100 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 4 Events for Episode 1 at Kamuinupuri, Tephra layer Ma-c1

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatomagmatic
   - - - -    - - - - Ash
0350 ± 100 years    - - - - VEI (Explosivity Index)

0150 ± 100 years Confirmed Eruption Max VEI: 4

Episode 1 | Eruption Episode Kamuinupuri, Tephra layers Ma-c4-c2
0150 ± 100 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 4 Events for Episode 1 at Kamuinupuri, Tephra layers Ma-c4-c2

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatomagmatic
   - - - -    - - - - Ash
0150 ± 100 years    - - - - VEI (Explosivity Index)

2050 BCE ± 40 years Confirmed Eruption Max VEI: 4

Episode 1 | Eruption Episode Kamuinupuri, Tephra layer Ma-d
2050 BCE ± 40 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 5 Events for Episode 1 at Kamuinupuri, Tephra layer Ma-d

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatomagmatic
   - - - -    - - - - Pyroclastic flow
   - - - -    - - - - Pumice
2050 BCE ± 40 years    - - - - VEI (Explosivity Index)

2800 BCE ± 750 years Confirmed Eruption Max VEI: 3

Episode 1 | Eruption Episode Kamuinupuri, Tephra layer Ma-e'
2800 BCE ± 750 years - Unknown Evidence from Correlation: Tephrochronology

List of 4 Events for Episode 1 at Kamuinupuri, Tephra layer Ma-e'

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatomagmatic
   - - - -    - - - - Tephra
2800 BCE ± 1000 years    - - - - VEI (Explosivity Index)

3550 BCE ± 40 years Confirmed Eruption Max VEI: 4

Episode 1 | Eruption Episode Kamuinupuri, Tephra layer Ma-e
3550 BCE ± 40 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 5 Events for Episode 1 at Kamuinupuri, Tephra layer Ma-e

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Phreatomagmatic
   - - - -    - - - - Pyroclastic flow
   - - - -    - - - - Pumice
3550 BCE ± 40 years    - - - - VEI (Explosivity Index)

5550 BCE ± 100 years Confirmed Eruption Max VEI: 6

Episode 1 | Eruption Episode Tephra layers Ma-j-f
5550 BCE ± 100 years - Unknown Evidence from Isotopic: 14C (calibrated)

List of 5 Events for Episode 1 at Tephra layers Ma-j-f

Start Date End Date Event Type Event Remarks
   - - - -    - - - - Explosion
   - - - -    - - - - Pyroclastic flow
   - - - -    - - - - Pumice violent, strong, or large
   - - - -    - - - - Caldera Explosion
5550 BCE ± 100 years    - - - - VEI (Explosivity Index)
Deformation History

There is no Deformation History data available for Mashu.

Emission History

There is no Emissions History data available for Mashu.

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 Mashu in the Smithsonian's NMNH Department of Mineral Sciences Rock and Ore collection.

External Sites