Volcanos

Roundup of Global Volcanic Activity – New Activity for the week 23 February – 1 March 2022

Asosan – Kyushu (Japan) : JMA reported that the amplitude of volcanic tremor signals at Asosan increased at around 0500 on 24 February and then increased again around 0900. Tremor amplitude decreased at around 1540 on 27 February. White plumes continued to rise 700-800 m above the crater rim during 24-28 February.

Ontakesan – Honshu (Japan) : JMA reported that the number of volcanic earthquakes at Ontakesan began increasing at 1415 on 23 February. Four minutes later a volcanic tremor signal was detected along with uplift on the S flank. At 1635 JMA raised the Alert Level to 2 (on a scale of 1-5). The report warned the public to stay at least 1 km away from Crater 79-7 on the SW flank of the Kenga-mine summit. After a peak on 25 February, the number of daily volcanic earthquakes began to decline; there were two volcanic earthquakes recorded on 24 February, a total of 17 on 25 February, 4-5 per day during 26-28 February, and 3 on 1 March. During an overflight on 25 February scientists observed no changes in the fumarolic areas or other morphological changes on the volcano.

Telica – Sierra de los Marrabios : Based on satellite and webcam images, the Washington VAAC reported that during 21-24 and 27-28 February multiple ash emissions at Telica rose as high as 1.5 km (5,000 ft) a.s.l. and drifted as far as 55 km W, WSW, and SW.

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