Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 17 November-23 November 2021 (New Activity / Unrest)
JMA lowered the Alert Level for Asosan to 2 (on a scale of 1-5) at 1100 on 18 November and decreased the restricted area to a radius of 1 km, noting that no eruptions had been recorded since the 21 October eruption. The sulfur dioxide emission rate remained elevated in November and was 2,100 tons per day on 16 November. The amplitudes of volcanic microtremors fluctuated for a period after the eruption, though they were generally small beginning on 1 November.
Mi, 17. Nov 2021, 06:0006:00 AM | VON: VN
Source: Japan Meteorological Agency (JMA)
From: Global Volcanism Program, 2021. Report on Asosan. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 17 November-23 November 2021. Smithsonian Institution and US Geological Survey.
Mi, 20. Okt 2021, 06:53
A strong explosion occurred this morning, at around 11:43 local time, from the volcano. ... Read all
Mi, 20. Okt 2021, 06:00
Asosan volcano (Kyushu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 20 October-26 October 2021 (New Activity / Unrest)
JMA characterized the eruption at Asosan that occurred at 1143 on 20 October as medium-sized. The event ejected blocks 900 m S, produced pyroclastic flows that descended 1.3 km W, and generated an ash plume that rose 3.5 km above the crater rim. Very small eruptive events were recorded during 1244-1410. ... Read all