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Japan · Stratovolcano

Lake Tōya

Toya

Type
Stratovolcano
Elevation
733m
Last eruption
2001
Lake Tōya
Photo: 663highland · CC BY 2.5 · Wikimedia Commons
Type
Stratovolcano
Country
Japan
Region
Northwestern Pacific / Northeast Japan Volcanic Arc
Elevation
733m
Coordinates
42.544, 140.839
Last eruption
2001
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Basalt / Picro-basalt

Geological summary

Usuzan, one of Hokkaido's most well-known volcanoes, is a small stratovolcano located astride the southern topographic rim of the 110,000-year-old Toya caldera.

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

From Wikipedia

Lake Tōya is a volcanic caldera lake in Shikotsu-Toya National Park, Abuta District, Hokkaido, Japan. It is part of "Toya Caldera and Usu Volcano Global Geopark" which joins in Global Geoparks Network. The stratovolcano of Mount Usu lies on the southern rim of the caldera. The lake is nearly circular, being 10 km (6.2 mi) in diameter from the eastwest and 9 km (5.6 mi) from the northsouth. The town of Tōyako comprises most of the area surrounding the lake and the town of Sōbetsu is located on the eastern side.

Wikipedia · CC BY-SA · Read full article →

Eruption history

14 recordedGlossary

Record summary

Confirmed eruptions
13
Uncertain eruptions
1
Span of confirmed record
6550 BCE (±1500 yrs) – 2001
Largest confirmed eruption
VEI 5 (1663)
Confirmed eruptions since 1900
4
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
6550 BCE~6265 BCE · 1 eruptions · max VEI ?4840 BCE~4555 BCE · 1 eruptions · max VEI ?1430~1715 · 5 eruptions · max VEI 51715~2000 · 7 eruptions · max VEI 46550 BCE4555 BCE2275 BCE280 BCE1715

Detailed timeline

  1. 2000VEI 2Observed
    2000-03-31 – 2001-09-15
    Usu N flank (Kompira-yama & W Nishi-yama)
  2. 1977VEI 3Observed
    1977-08-07 – 1982-03-16
    Usu-Shinzan
  3. 1944VEI 2Observed
    1944-06-23 – 1945-09-19
    Usu East flank (Showa-Shinzan)
  4. 1910VEI 2Observed
    1910-07-25 – 1910-11-16
    Usu North flank (Meiji-Shinzan)
  5. 1853VEI 4Observed
    1853-04-22 – 1853-09-16
    O-Usu
  6. 1822VEI 4Observed
    1822-03-12 – 1822-09-16
    Foot of Ko-Usu dome, Ogari-yama
  7. 1769VEI 4Observed
    1769-01-23 – end unknown
    Ko-Usu
  8. 1690 (±10 yrs)VEI ?Geological estimate
    1690 – end unknown
    Usu
  9. 1663VEI 5Observed
    1663-08-16 – 1663-09-05
    Usu
  10. 1638VEI ?Observed
    1638-07-25 – end unknown
    Usu
  11. 1626VEI ?Observed
    1626-05-19 – 1626-07
    Usu
  12. 1611VEI ?Method not stated
    1611-10 – end unknown
  13. 4600 BCE (±200 yrs)VEI ?Geological estimate
    4600 BCE – end unknown
    Usu
  14. 6550 BCE (±1500 yrs)VEI ?Geological estimate
    6550 BCE – end unknown
    Usu

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.