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Toshima

Stratovolcano · Japan · 508m

Steep cliffs up to 300-m-high surround the small island of Toshima. Toshimamura, the port village of the island, is to the far left in this view from the west. Toshima lies about 20 km W of the main volcanic front of the Izu-Marianas arc. Recent activity occurred between about 8,000 and 40,00 years ago.
Steep cliffs up to 300-m-high surround the small island of Toshima. Toshimamura, the port village of the island, is to the far left in this view from the west. Toshima lies about 20 km W of the main volcanic front of the Izu-Marianas arc. Recent activity occurred between about 8,000 and 40,00 years ago. · Photo: Copyrighted photo by Shun Nakano (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/). · Wikimedia Commons
Type
Stratovolcano
Country
Japan
Region
Northwestern Pacific Volcanic Regions / Izu Volcanic Arc
Elevation
508m
Coordinates
34.520, 139.279
Last eruption
-4550
Tectonic setting
Subduction zone / Oceanic crust (< 15 km)
Landform
Composite
Major rock type
Basalt / Picro-Basalt
Geological summary

The small 2 x 2.4 km island of Toshima is located in the northern Izu Islands south of Izu-Oshima Island about 20 km W of the main volcanic front. Steep cliffs up to 300 m high ring the basaltic to basaltic andesite island on three sides. The summit is asymmetrically located opposite the more gentle slopes of the northern side of the island, where the village of Toshima is located. The latest known eruption of this stratovolcano occurred sometime between about 9,000 and 4,000 years ago, producing a lava flow from Kajiana crater.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
4550 BCE~4550 BCE · 1 eruptions · max VEI 04550 BCE4550 BCE4549 BCE4549 BCE4549 BCE

Detailed timeline

  1. 4550 BCE (±2550 yrs)VEI 0Geological estimate
    BCE 4550 – Ongoing
    Kajiana crater

External links

⚠ For reference only. Not for emergency response.