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Iwo-jima volcano (Japan): small phreatic explosion

dim., 28 nov. 2021, 05:05
05:05 AM | AUTEUR : MARTIN
Steam plumes from Iwo-jima volcano on 24 Nov (image: JMSDF_21aw/twitter)
Steam plumes from Iwo-jima volcano on 24 Nov (image: JMSDF_21aw/twitter)
Steam plumes from Iwo-jima volcano on 24 Nov (image: JMSDF_21aw/twitter)
Steam plumes from Iwo-jima volcano on 24 Nov (image: JMSDF_21aw/twitter)
The Fleet Air Group of the Maritime Self-Defense Force reported on their Twitter account about a small eruption near the northwestern coast at about 03:30 local time on 24 November. Judging from available images, it was likely a phreatic or hydrothermal explosion, i.e. steam-driven only, caused by overheated water flashing to steam.
The height of the ash plume is unknown and was not reported yet nor by the Japan Meteorological Agency and VAAC.
Many phreatic eruptions occurred at the volcano in historic times.

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