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To-shima   »  Summary

To-shima

To-shima Photo

Country:Japan
Subregion Name:Izu Islands (Japan)
Volcano Number:0804-011
Volcano Type: Stratovolcano
Volcano Status:Tephrochronology
Last Known Eruption: 4550 BC ± 1000 years
Summit Elevation: 508 m 1,667 feet
Latitude: 34.517°N 34°31'1"N
Longitude: 139.283°E 139°16'57"E

The small 2 x 2.4 km island of To-shima is located in the northern Izu Islands south of Oshima Island and lies about 20 km west of the main volcanic front. Steep cliffs up to 300 m high ring the basaltic-to-basaltic andesite island on three sides. The 508-m-high summit of the island is asymmetrically located opposite the more gentle slopes of the northern side of the island, where the village of To-shima is located. The latest known eruption of To-shima stratovolcano occurred sometime between about 9000 and 4000 years ago, producing a lava flow from Kajiana crater.

Global Volcanism ProgramDepartment of Mineral SciencesNational Museum of Natural HistorySmithsonian Institution

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