Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 27 October-2 November 2021 (Continuing Activity)
AVO reported that eruptive activity at Semisopochnoi's North Cerberus crater continued during 26 October-2 November. Daily tremor and minor explosions were detected in seismic and infrasound data. Although weather clouds often prevented webcam and satellite views, intermittent, low-level ash emissions were visible during clear views, rising as high as 3.7 km (12,000 ft) a.s.l. and dissipating quickly.
mer., 27 oct. 2021, 06:0006:00 AM | AUTEUR : VN
Sulfur dioxide emissions were detected during 26-27 and 30-31 October. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.
Source: US Geological Survey Alaska Volcano Observatory (AVO)
From: Global Volcanism Program, 2021. Report on Semisopochnoi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 27 October-2 November 2021. Smithsonian Institution and US Geological Survey.
mar., 26 oct. 2021, 13:15
mar., 26 oct. 2021, 07:00