Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Hokkaido-Komagatake
The truncated Komaga-take volcano on the Oshima Peninsula of southern Hokkaido rises to the north above Lake Onuma. Komaga-take is one of the most active volcanoes of Japan's northernmost island. The sharp-peaked summit is the rim of a breached crater that formed as a result of edifice collapse. Hummocky debris-avalanche deposits were responsible for the formation of Lake Onuma. A period of more frequent explosive activity began with a major explosive eruption in 1640, one of the largest in Japan during historical time. Photo by Ichio Moriya (Kanazawa University).
Volcano Number:285020
Volcano Name:Hokkaido-Komagatake
Country:Japan
Volcano Type:Stratovolcano
Last Eruption:2000 CE
Elevation:1131m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:173
Pop. within 10km:23091
Pop. within 30km:234213
Pop. within 100km:962081
Latitude:42.063
Longitude:140.677



Eruption Data from the Global Volcanism Program of the Smithsonian Institution
Volcano Number Volcano Name Eruption Number Activity Type Explosivity Index Max Explosivity Index Modifier Activity Area Activity Unit Start Evidence Method Start Date End Date
285020 Hokkaido-Komagatake 18559 Confirmed Eruption 5 Tephra layer Ko-g Radiocarbon (corrected) -4600
285020 Hokkaido-Komagatake 18560 Confirmed Eruption NS1 and NS2 tephras Tephrochronology -4500
285020 Hokkaido-Komagatake 18561 Confirmed Eruption 4 P Tephra layer Ko-f Radiocarbon (corrected) -4350
285020 Hokkaido-Komagatake 18562 Confirmed Eruption 5 Tephra layer Ko-d Historical Observations 1640/7/31 1640/10/9
285020 Hokkaido-Komagatake 18563 Confirmed Eruption 4 Tephra layer Ko-c2 Historical Observations 1694/7/4 1694/7/6
285020 Hokkaido-Komagatake 18564 Uncertain Eruption 1710/6/27
285020 Hokkaido-Komagatake 18565 Uncertain Eruption 2 1765
285020 Hokkaido-Komagatake 18566 Uncertain Eruption 2 1784/2/8
285020 Hokkaido-Komagatake 18567 Confirmed Eruption 4 Ansei Crater Tephra layer Ko-c1 Historical Observations 1856/9/25
285020 Hokkaido-Komagatake 18568 Confirmed Eruption 2 NW side of 1856 (Ansei) crater Historical Observations 1888/4/14
285020 Hokkaido-Komagatake 18569 Confirmed Eruption 2 South of Ansei Crater Historical Observations 1905/8/19 1905/9/1
285020 Hokkaido-Komagatake 18570 Confirmed Eruption 2 SE of Ansei Crater Historical Observations 1919/6/17 1919/7/26
285020 Hokkaido-Komagatake 18571 Confirmed Eruption 2 Historical Observations 1922/5/22
285020 Hokkaido-Komagatake 18572 Confirmed Eruption 2 Historical Observations 1923/2/27 1923/3/15
285020 Hokkaido-Komagatake 18573 Confirmed Eruption 2 Historical Observations 1924/7/31
285020 Hokkaido-Komagatake 18574 Confirmed Eruption 1 Historical Observations 1928/3/28
285020 Hokkaido-Komagatake 18575 Confirmed Eruption 4 SE and NE of Ansei Crater Layer Ko-a Historical Observations 1929/6/17 1929/9/6
285020 Hokkaido-Komagatake 18577 Uncertain Eruption 1935/10/15 1935/10/15
285020 Hokkaido-Komagatake 18578 Confirmed Eruption 1 Historical Observations 1937/3/17 1937/3/19
285020 Hokkaido-Komagatake 18579 Confirmed Eruption 3 NW-SE 1.6-km fissure Historical Observations 1942/11/16 1942/11/18
285020 Hokkaido-Komagatake 18580 Confirmed Eruption 1 1929 crater and summit crater fissure Historical Observations 1996/3/5 1996/3/12
285020 Hokkaido-Komagatake 18581 Confirmed Eruption 2 1996 crater Historical Observations 1998/10/25 1998/10/25
285020 Hokkaido-Komagatake 18582 Confirmed Eruption 1 Historical Observations 2000/9/4 2000/11/8
Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.


Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal


Data from the SESAR Database


Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.