Nakano-shima volcano

stratovolcanoes 979 m / 3,212 ft
Ryukyu Islands, Japan, 29.86°N / 129.86°E
Current status: normal or dormant (1 out of 5)

Nakano-shima volcano is a stratovolcano forming the 9 x 5 km island of the same name, which belongs to the Ryukyu Island chain in southern Japan.
The island is surrounded by coral reefs, but unlike older extinct ocean islands that sink and form reefs Nakano-shima's volcano is active. There are no known magmatic eruptions in historic times, but a small mud eruption occurred in 1914, and increased "smoking" was seen in 1949.

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Typical eruption style: explosive
Nakano-shima volcano eruptions: 1949 (uncertain), 1914 (phreatic explosions)

TimeMag. / DepthDistance/Location
Tuesday, October 19, 2021 00:40 GMT (1 earthquake)
Oct 19, 2021 9:40 am (GMT +9) (Oct 19, 2021 00:40 GMT)
2.8

75 km
17 km (10.6 mi)
East China Sea, Japan

Background

An older, eroded volcano forms the southern half of the island and a flat plateau separates it from the present-day active volcano which forms the northern half and has an andesitic cone called On-take.
On-take contains a summit crater that is filled with water during the rainy season. Sulfur deposits were mined at a SE-flank solfatara until 1944.

Nakano-shima Photos

View over the crater of Mt Ontake volcano on Suwanose-jima; Nakano-jima island in the background to the NE. (Photo: Tom Pfeiffer)
View over the crater of Mt Ontake volcano on Suwanose-jima; Nakano-jima island in the background to the NE. (Photo: Tom Pfeiffer)
View of Mt Ontake stratovolcano of Nakano-jima volcano, Suwanose-jima's neighbor to the northeast. A gas plume can be seen rising from the summit crater, suggesting the volcano is active. (Photo: Tom Pfeiffer)
View of Mt Ontake stratovolcano of Nakano-jima volcano, Suwanose-jima's neighbor to the northeast. A gas plume can be seen rising from the summit crater, suggesting the v...
 



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