Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 3 November-9 November 2021 (Continuing Activity)
AVO reported that eruptive activity at Semisopochnoi's North Cerberus crater continued during 2-9 November. Daily tremor and minor explosions were detected in seismic and infrasound data. Several small low-level ash plumes were visible in webcam data rising to an estimated altitude of 1.5 (5,000 ft) a.s.l. during 2-3 November.
Mi, 3. Nov 2021, 06:0006:00 AM | VON: VN
Weather clouds obscured views during 4-7 November with the top of the cloud deck varying at altitudes of 3-6.1 km (10,000-20,000 ft) a.s.l.; ash plumes likely continued to be emitted though none rose above the cloud deck. Ash plumes were typically dissipating within 50 km of the volcano. 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 3 November-9 November 2021. Smithsonian Institution and US Geological Survey.
Di, 2. Nov 2021, 11:30
Di, 2. Nov 2021, 00:00