Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Chokaisan
Massive Chokai volcano, the largest of NE Honshu, is seen here from the NE. Chokai is composed of two large overlapping stratovolcanoes. The younger eastern volcano is cut by the large horseshoe-shaped caldera, seen here breached to the north, that was the source of the Kisakata debris avalanche. Pyroclastic cones later filled much of the area near the back wall of the caldera. Chokai has erupted frequently since one of the earliest historically documented eruptions in Japan in 573 CE. Photo courtesy Ichio Moriya (Kanazawa University).
Volcano Number:283220
Volcano Name:Chokaisan
Country:Japan
Volcano Type:Stratovolcano(es)
Last Eruption:1974 CE
Elevation:2236m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:131
Pop. within 10km:707
Pop. within 30km:185681
Pop. within 100km:2301576
Latitude:39.099
Longitude:140.049



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
283220 Chokaisan 18003 Confirmed Eruption 0 West flank (Saruana crater) Tephrochronology -1050
283220 Chokaisan 18004 Confirmed Eruption Higashi-Chokai Radiocarbon (uncorrected) -650
283220 Chokaisan 18005 Confirmed Eruption OD-12 tephra Tephrochronology -450
283220 Chokaisan 18006 Uncertain Eruption 573
283220 Chokaisan 18007 Uncertain Eruption 577/12/1 578/7/15
283220 Chokaisan 18008 Uncertain Eruption 610
283220 Chokaisan 18009 Confirmed Eruption Historical Observations 711
283220 Chokaisan 18010 Uncertain Eruption 717
283220 Chokaisan 18011 Uncertain Eruption 804 806
283220 Chokaisan 18012 Confirmed Eruption Historical Observations 817
283220 Chokaisan 18013 Confirmed Eruption Historical Observations 830
283220 Chokaisan 18014 Uncertain Eruption 839/10/14
283220 Chokaisan 18015 Uncertain Eruption 856
283220 Chokaisan 18016 Uncertain Eruption 857
283220 Chokaisan 18017 Uncertain Eruption 3 861
283220 Chokaisan 18018 Confirmed Eruption 2 Historical Observations 871/5/5
283220 Chokaisan 18019 Uncertain Eruption 884/7/26 884
283220 Chokaisan 18021 Confirmed Eruption Historical Observations 939/5/15
283220 Chokaisan 18022 Uncertain Eruption 948/12/31
283220 Chokaisan 18023 Uncertain Eruption 999
283220 Chokaisan 18024 Uncertain Eruption 1477
283220 Chokaisan 18025 Uncertain Eruption 1560
283220 Chokaisan 18026 Confirmed Eruption Historical Observations 1659 1663
283220 Chokaisan 18027 Uncertain Eruption 2 1735
283220 Chokaisan 18028 Uncertain Eruption 2 1738/12/31
283220 Chokaisan 18029 Confirmed Eruption 2 ? Small crater at foot of Kojin-yama Historical Observations 1740 1747
283220 Chokaisan 18030 Uncertain Eruption 2 1764
283220 Chokaisan 18031 Confirmed Eruption 2 Shinzan (foot of Kojin-yama) Historical Observations 1800 1804
283220 Chokaisan 18032 Confirmed Eruption 2 ? Near Shinzan and Shichiko-zan Historical Observations 1821/5/23
283220 Chokaisan 18033 Confirmed Eruption 2 ? Historical Observations 1834/7/9 1834
283220 Chokaisan 18034 Confirmed Eruption 1 E side of Shinzan, W of Kojin-yama Historical Observations 1974/3/1 1974/4/30
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
Sorry. No data exist for this volcano in the SESAR database.


Data from the MaGa Database
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