Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 December-4 January 2022 (Continuing Activity)
AVO reported that low-level eruptive activity and elevated seismicity at Semisopochnoi's North Cerberus crater continued during 29 December 2021 to 4 January 2022. Minor ash-and-steam emissions were visible in webcam images during 28-29 December. Ash plumes observed in webcam and satellite images on 31 December rose to 1.5 km (5,000 ft) a.s.l. and drifted as far as 100 km NE.
Wed, 29 Dec 2021, 16:2616:26 PM | BY: VN
Ash emissions observed in webcam images during daylight hours on 1 and 2 January were being blown down the flank by high winds. Small explosions were detected in seismic data during 2-4 January, though cloud cover obscured views. 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 29 December-4 January 2022. Smithsonian Institution and US Geological Survey.
Thu, 23 Dec 2021, 22:45
Thu, 23 Dec 2021, 12:45