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Fukutoku-Oka-no-Ba volcano (Volcano Islands, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 18 August-24 August 2021 (New Activity / Unrest)

Ср, 18 авг 2021, 06:00
06:00 AM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: VN
The Japan Coast Guard reported that the eruption at Fukutoku-Oka-no-Ba continued during 16-22 August. Gas-and-steam emissions continued to be observed from the center of the island on 16 August. The pumice raft that was first identified on 15 August had expanded to about 100 km to the WNW and was about 13 km wide.
Brown discoloration was visible surrounding the new island, which had a variable shape but a consistent diameter of 1 km by 16 August.



A local fisherman in the Ogasawara Islands who was fishing in South Iwo Jima (5 km NNE) posted photos and videos on 17, 20, and 22 August that showed strong white gas-and-steam plumes rising above the volcano. On 20 August lightning was visible within the gas-and-steam plume. On 22 August the plume was observed during 0430-0630.

Sources: Japan Coast Guard, Yutaka Kosugi
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From: Global Volcanism Program, 2021. Report on Fukutoku-Oka-no-Ba. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 18 August-24 August 2021. Smithsonian Institution and US Geological Survey.

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