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Iwo-jima volcan éruptions

caldeira 161 m / 528 ft
Volcano Islands (Japon), 24.75°N / 141.29°E
Liste des éruptions: 2012, 2001, 1982, 1980, 1978, 1976, 1974 (?), 1969 (?), 1967, 1957, 1943


2001 eruption

A submarine eruption occurred from 3 vents SE of Iwo-jima volcano on 21 September 2001. The activity built 10 m diameter pyroclastic cone on that day. Until 19 October, there was no further activity, but on 19 October a small phreatic eruption occurred at Idogahama, the name of a beach on the NW coast of the island. the explosion formed a new crater 10 m wide and 2-3 m deep.

1982 eruption

On 9-10 March 1982, 5 phreatic eruptions occurred from vents on the NW shore of Iwo-jima island.

1957 eruption

A phreatic eruption occurred at Iwo-Jima volcano on 28 March 1957. The eruption occurred without warning 2 km NE of Suribachi-yama. The eruption lasted for 65 minutes and ejected material 30 m high from a single crater. A second crater formed by collapse 50 minutes after the eruption ended. The collapse crater was 30 m wide and 15 m deep. Gas emissions increased on 31 March, and 3 dead birds were found in the crater.
Source: Gilbert Corwin, and H. L. Foster (1959) "The 1957 explosive eruption on Iwo Jima, Volcano Islands", American Journal of Science, Vol. 257, pp. 161-171
mer., 10 août 2022, 14:00

Ioto volcano (Volcano Islands) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 August-9 August 2022 (New Activity / Unrest)

JMA reported that minor eruptive activity off the coast at Ioto (Iwo-jima) had been visible daily during 11-31 July. On 14 July pumice pieces from the eruption washed up onto the shore at Onohama and were photographed during a field survey conducted by the National Research Institute for Earth Science and Disaster Prevention. JMA scientist visited the site on 31 July and confirmed the pumice deposits on the beach. ... Read all
mer., 3 août 2022, 14:00

Ioto volcano (Volcano Islands) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 July-2 August 2022 (New Activity / Unrest)

Satellite images of Ioto (Iwo-jima) acquired on 15 July showed a darker area in the water along the SE coast, possibly above or near the 2001 vent, and a plume of discolored water drifting NE. Video taken on or around 25 July showed a white plume rising from the same area. Satellite images during 30-31 July showed small rounded gray zones at the water surface. ... Read all
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