Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Mashu
The deep blue waters of 6-km-wide Mashu caldera are seen here from its western rim. The small island of Kamuishu in the center of Lake Mashu (right-center) represents the tip of a mostly submerged lava dome. Mashu is a Holocene caldera that truncates a stratovolcano constructed on the ESE rim of the large Kutcharo caldera. Following caldera collapse, a small stratovolcano, Kamuinupuri (whose lower flanks are visible at the far right), was formed beginning about 4000 years ago. Copyrighted photo by Shun Nakano, 2001 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).
Volcano Number:285081
Volcano Name:Mashu
Country:Japan
Volcano Type:Caldera
Last Eruption:1080 CE
Elevation:857m
Tectonic Setting:Subduction zone / Continental crust (> 25 km)
Pop. within 5km:9794
Pop. within 10km:9794
Pop. within 30km:25627
Pop. within 100km:632919
Latitude:43.572
Longitude:144.561



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
285081 Mashu 18708 Confirmed Eruption 6 Tephra layers Ma-j-f Radiocarbon (corrected) -5550
285081 Mashu 18709 Confirmed Eruption 4 Kamuinupuri Tephra layer Ma-e Radiocarbon (corrected) -3550
285081 Mashu 18710 Confirmed Eruption 3 Kamuinupuri Tephra layer Ma-e' Tephrochronology -2800
285081 Mashu 18711 Confirmed Eruption 4 Kamuinupuri Tephra layer Ma-d Radiocarbon (corrected) -2050
285081 Mashu 18712 Confirmed Eruption 4 Kamuinupuri Tephra layers Ma-c4-c2 Radiocarbon (corrected) 150
285081 Mashu 18713 Confirmed Eruption 2 Kamuinupuri Tephra layer Ma-c1 Radiocarbon (corrected) 350
285081 Mashu 18714 Confirmed Eruption 5 Kamuinupuri Tephra layer Ma-b Radiocarbon (corrected) 1080
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
Sorry. No data exist for this volcano in the EarthChem Portal.


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


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