Semisopochnoi volcano (Aleutian Islands): Aviation Color Code reduced to Yellow
Thu, 24 Nov 2022, 04:4404:44 AM | BY: MARTIN
The Aviation Color Code for the volcano was lowered to "Yellow", as a decreasing trend of the activity at the volcano continues.
Cloud-free satellite imagery of Semisopochnoi volcano on 13 Nov (image: Sentinel 2)
Although the active north cone of Mount Cerberus continues to produce a vapor plume and elevated seismicity, no ash emissions nor explosions have been detected since 7 November.
Source: Alaska Volcano Observatory volcano activity update 24 November 2022
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
Wed, 9 Nov 2022, 15:00
Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 November-8 November 2022 (Continuing Activity)
On 7 November AVO stated that small explosions at the N crater of Mount Cerberus at Semisopochnoi had been detected in geophysical data during the previous week and volcanic tremor simultaneously resumed. Though ash emissions were not visually observed, the type of unrest was similar to previous periods associated with ash emissions below 3 km (10,000 ft) a.s.l.; the Aviation Color Code was raised to Orange (the second highest level on a four-color scale) and the Volcano Alert Level was raised to Watch (the second highest level on a four-level scale). Seismicity was low during 7-8 November, and clouds prevented webcam and satellite images. ... Read all