Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 23 November-29 November 2022 (Continuing Activity)
On 23 November AVO lowered the Aviation Color Code for Semisopochnoi to Yellow (the second lowest level on a four-color scale) and the Volcano Alert Level to Advisory (the second lowest level on a four-level scale) noting that no ash emissions or explosive activity had been detected since 7 November. Seismicity had decreased, though remained at elevated levels. Steam emissions from the active vent in the N crater of Mount Cerberus persisted.
Ср, 30 ноя 2022, 15:0015:00 PM | ПЇЅПЇЅПЇЅПЇЅПЇЅ: VN
Source: US Geological Survey Alaska Volcano Observatory (AVO)
From: Global Volcanism Program, 2022. Report on Semisopochnoi. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 23 November-29 November 2022. Smithsonian Institution and US Geological Survey.
Thu, 24 Nov 2022, 04:44
The Aviation Color Code for the volcano was lowered to "Yellow", as a decreasing trend of the activity at the volcano continues. ... Read all
Wed, 23 Nov 2022, 15:00
Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 16 November-22 November 2022 (Continuing Activity)
AVO reported ongoing low-level seismicity at Semisopochnoi characterized by intermittent seismic tremor and occasional low-frequency earthquakes during 16-22 November. Satellite and webcam views were mostly obscured by weather clouds, though during clear views continuous gas-and-steam emissions from the N crater of Mount Cerberus were visible. The Aviation Color Code remained at Orange and the Volcano Alert Level remained at Watch. ... Read all