Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Ioto
Discolored water from a submarine eruption in September 2001 surrounds Ioto, also known as Iwo-jima. The triangular, 8-km-long island, whose name means "Sulfur Island," lies within a 9-km-wide submarine caldera and narrows toward its SW tip, where the Suribachiyama cone is located. The yellow arrow marks the site of the 2001 submarine vent. Ioto (Iwo-jima) has undergone dramatic uplift for at least the past 700 years accompanying resurgent doming of the caldera. Numerous historical phreatic eruptions have accompanied the remarkable uplift. Photo by Nakahori, 2001 (Japan Meteorological Agency, published in the Bulletin of the Global Volcanism Network).
Volcano Number:284120
Volcano Name:Ioto
Country:Japan
Volcano Type:Caldera
Last Eruption:2012
Elevation:169m
Tectonic Setting:Subduction zone / Crustal thickness unknown
Pop. within 5km:1179
Pop. within 10km:1179
Pop. within 30km:1189
Pop. within 100km:1370
Latitude:24.751
Longitude:141.289



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
284120 Ioto 18402 Confirmed Eruption Motoyama Radiocarbon (corrected) -850
284120 Ioto 18403 Confirmed Eruption 1 Chidoriga-ana Historical Observations 1889/12/31
284120 Ioto 18404 Confirmed Eruption 1 West side (Asodai) Historical Observations 1922
284120 Ioto 18405 Confirmed Eruption 1 NW side near the coast Historical Observations 1930
284120 Ioto 18406 Confirmed Eruption 1 SW side at Chidoriga-hara Historical Observations 1935
284120 Ioto 18407 Confirmed Eruption 1 North and west sides near the coast Historical Observations 1944
284120 Ioto 18408 Confirmed Eruption 1 Chidoriga-hara Historical Observations 1957/3/28 1957/3/28
284120 Ioto 18409 Confirmed Eruption 1 West side (Asodai) Historical Observations 1967/12/23 1967/12/23
284120 Ioto 18410 Confirmed Eruption 1 West side (Asodai) Historical Observations 1969/1/12 1969/1/21
284120 Ioto 18411 Confirmed Eruption 1 Historical Observations 1969/12/1 1969/12/1
284120 Ioto 18412 Uncertain Eruption 0 NW of Iwo-jima (Kaiseinishinoba) 1974/1/16 1974/2/2
284120 Ioto 18413 Confirmed Eruption 1 West side (Asodai) Historical Observations 1976/1/16
284120 Ioto 18414 Confirmed Eruption 1 West side (Asodai) Historical Observations 1978/12/11 1978/12/11
284120 Ioto 18415 Confirmed Eruption 1 Kitanohara Historical Observations 1980/3/13 1980/3/13
284120 Ioto 18416 Confirmed Eruption 1 NW side (Idogahama beach) Historical Observations 1982/3/9 1982/3/10
284120 Ioto 18417 Confirmed Eruption 1 West side (Asodai) Historical Observations 1982/11/28 1982/12/16
284120 Ioto 18418 Uncertain Eruption 1 ? Asodai area and NE of Iwo-jima 1993/10/27 1993/11/16
284120 Ioto 18419 Confirmed Eruption 1 NE side Historical Observations 1994/8/22 1994/8/22
284120 Ioto 18420 Confirmed Eruption 1 Asodai area Historical Observations 1999/9/10 1999/9/10
284120 Ioto 18421 Confirmed Eruption 1 Off SE coast and Idogahama (NW coast) Historical Observations 2001/9/21 2001/10/23
284120 Ioto 18422 Uncertain Eruption 1 Asodai area 2004/6/6 2004/6/8
284120 Ioto 18423 Uncertain Eruption 1 Historical Observations 2010/6/19 2010/6/19
284120 Ioto 20772 Confirmed Eruption 1 Asodai Historical Observations 2012/2/10 2012/5/2
Emissions Data from the Global Volcanism Program of the Smithsonian Institution No emissions data found for this volcano.


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.