The Russian Emergencies Ministry's department in the Far Eastern Sakhalin Region has reported an eruption on Mount Ebeko, a 1156 m volcano on the
northern end of Paramushir Island in the Kuril Archipelago, on Saturday 3 October 2018. The eruption produced an ash column about 4.5 km high,
which drifted about 5 km to the northeast. A warning has been
issued to aviation in the area. Ebeko is one of the most active
volcanoes in the Kuril group, with frequent small eruptions and lava
flows, though large eruptions are unusual.
Ash column over Mount Ebeko on Paramushir Island on 3 September 2018. Russian Academy of Sciences/Geophysical Survey/Kamchatka Branch.
The Kuril Archipelago runs from the northwestern tip of Hokkaido to the
southern tip of the Kamtchatka Peninsula. It marks the southern margin
of the Okhotsk Plate, which underlies the Sea of Okhotsk, the Kamchatka
Peninsula, Sakhalin Island and Tōhoku and Hokkaidō in Japan. Along this
southern margin the Pacific Plate is being subducted beneath the Okhotsk
Plate in the Kuril Trench. As the Pacific Plate sinks under the Okhotsk
Plate it is partial melted by the resultant friction and the heat of
the Earth's interior. Some of the melted material then rises up through
the overlying Okhotsk Plate as magma, fuelling the volcanoes of the Kuril
Archipelago.
Simple diagram showing the subduction of the Pacific Plate beneath the Okhotsk Plate along the Kuril Trench. Auburn University.
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