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Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 1 September-7 September 2021 (Continuing Activity)

Ср, 1 сен 2021, 06:00
06:00 AM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: VN
AVO reported that eruptive activity at Semisopochnoi's North Cerberus crater continued during 31 August-7 September. Multiple daily explosions were detected by seismic and infrasound networks. Ash-and-steam plumes from the explosions were sometimes confirmed in satellite and webcam images rising to altitudes lower than 3 km (10,000 ft) a.s.l., though during 6-7 September ash plumes rose as high as 4.6 km (15,000 ft) a.s.l.
Local ashfall on the island was visible in satellite data. Sulfur dioxide emissions were detected in satellite images during 31 August-2 September and on 6 September. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch.

Source: US Geological Survey Alaska Volcano Observatory (AVO)
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From: Global Volcanism Program, 2021. Report on Semisopochnoi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 1 September-7 September 2021. Smithsonian Institution and US Geological Survey.

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