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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: Izu-Oshima
A plume rises from the crater of Miharayama on Oshima island. It lies within a 4-km-wide caldera, the rim of which is prominently visible in this aerial photo from the SW. Dark-colored lava flows from the 1986 eruption cover part of the caldera floor. More than 40 cones are located within the caldera and along two parallel rift zones trending NNW-SSE across the island. The port city of Motomachi on the west coast is to the left and the island's airport is at the upper left. Photo by Ichio Moriya (Kanazawa University).
Volcano Number:
284010
Volcano Name:
Izu-Oshima
Country:
Japan
Volcano Type:
Stratovolcano
Last Eruption:
1990 CE
Elevation:
746m
Tectonic Setting:
Subduction zone / Oceanic crust (< 15 km)
Pop. within 5km:
2381
Pop. within 10km:
8037
Pop. within 30km:
8375
Pop. within 100km:
11837468
Latitude:
34.724
Longitude:
139.394
Details
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Izu-Oshima volcano in Sagami Bay, east of the Izu Peninsula, is the northernmost of the Izu Islands. The broad, low stratovolcano forms an 11 x 13 km island constructed over the remnants of three older dissected stratovolcanoes. It is capped by a 4-km-wide caldera with a central cone, Miharayama, that has been the site of numerous recorded eruptions datining back to the 7th century CE. More than 40 cones are located within the caldera and along two parallel rift zones trending NNW-SSE. Although it is a dominantly basaltic volcano, strong explosive activity has occurred at intervals of 100-150 years throughout the past few thousand years. A major eruption in 1986 produced spectacular lava fountains up to 1,600 m high and a 16-km-high eruption column; more than 12,000 people were evacuated from the island.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
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Data from the Earthchem Library
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Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
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Data from UNAVCO
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Data from USIEI
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Data from IRIS FDSNWS
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