Asamayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 21 August-27 August 2019 (New Activity / Unrest)
JMA reported that at 1928 on 25 August a small eruption at Asamayama generated a grayish-white ash plume that rose 600 m above the crater rim and drifted E. Large blocks were also ejected from the crater. Minor ashfall was reported in Karuizawa Town, Nagano Prefecture, about 4 km E.
Wed, 21 Aug 2019, 06:0006:00 AM | BY: VN
The plume then turned white and continuous emissions rose 200 m during 25-26 August. The Alert Level remained at 2 (on a scale of 1-5).
Source: Japan Meteorological Agency (JMA)
From: Global Volcanism Program, 2019. Report on Asamayama. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 21 August-27 August 2019. Smithsonian Institution and US Geological Survey.
Wed, 14 Aug 2019, 06:00
Asamayama volcano (Honshu, Japan) - Smithsonian / USGS Weekly Volcanic Activity Report for 14 August-20 August 2019 (New Activity / Unrest)
JMA reported that, after a small phreatic eruption occurred at Asamayama on 7 August, both seismic activity and sulfur dioxide emissions temporarily increased and then decreased later that day. During 8-19 August white plumes generally rose 400 m above the crater rim; occasionally they rose as high as 800 m. Sulfur dioxide emissions were 70-300 tons per day. ... Read all
Thu, 8 Aug 2019, 10:00
A small eruption occurred at the volcano yesterday, apparently with little warning. An explosion produced an ash plume that rose approx. 1800 m above the crater. Read all