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Japan · Caldera

Lake Mashū

Mashu

Type
Caldera
Elevation
857m
Last eruption
1080
Lake Mashū
Photo: Miya.m · CC BY-SA 3.0 · Wikimedia Commons
Type
Caldera
Country
Japan
Region
Northwestern Pacific / Kuril Volcanic Arc
Elevation
857m
Coordinates
43.572, 144.561
Last eruption
1080
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Caldera
Major rock type
Andesite / Basaltic andesite

Geological summary

Mashu is a 6-km-wide Holocene caldera that truncates a stratovolcano constructed on the ESE rim of the large Kussharo caldera.

Excerpt from the Global Volcanism Program, Smithsonian Institution · Read the full summary on GVP →

From Wikipedia

Lake Mashū is an endorheic crater lake formed in the caldera of a potentially active volcano. It is located in Akan Mashu National Park on the island of Hokkaido, Japan. It has been called the clearest lake in the world.

Wikipedia · CC BY-SA · Read full article →

Eruption history

7 recordedGlossary

Record summary

Confirmed eruptions
7
Uncertain eruptions
0
Span of confirmed record
5550 BCE (±100 yrs) – 1080
Largest confirmed eruption
VEI 6 (5550 BCE)
Confirmed eruptions since 1900
0
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
5550 BCE~5329 BCE · 1 eruptions · max VEI 63561 BCE~3340 BCE · 1 eruptions · max VEI 42898 BCE~2677 BCE · 1 eruptions · max VEI 32235 BCE~2014 BCE · 1 eruptions · max VEI 425 BCE~196 · 1 eruptions · max VEI 4196~417 · 1 eruptions · max VEI 2859~1080 · 1 eruptions · max VEI 55550 BCE4003 BCE2235 BCE688 BCE859

Detailed timeline

  1. 1080 (±100 yrs)VEI 5Geological estimate
    1080 – end unknown
    Kamuinupuri
  2. 350 (±100 yrs)VEI 2Geological estimate
    350 – end unknown
    Kamuinupuri
  3. 150 (±100 yrs)VEI 4Geological estimate
    150 – end unknown
    Kamuinupuri
  4. 2050 BCE (±40 yrs)VEI 4Geological estimate
    2050 BCE – end unknown
    Kamuinupuri
  5. 2800 BCE (±750 yrs)VEI 3Geological estimate
    2800 BCE – end unknown
    Kamuinupuri
  6. 3550 BCE (±40 yrs)VEI 4Geological estimate
    3550 BCE – end unknown
    Kamuinupuri
  7. 5550 BCE (±100 yrs)VEI 6Geological estimate
    5550 BCE – end unknown

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.