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Semisopochnoi volcano, United States, Aleutian Islands: news & activity updates

Updated: Mar 28, 2024 18:51 GMT-

Semisopochnoi (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 20 April-26 April 2022

Fri, 29 Apr 2022, 07:04
AVO reported that low-level eruptive activity at Semisopochnoi's North Cerberus cone continued during 19-26 April. Periods of seismic tremor were occasionally detected and small explosions were recorded in seismic data during 19-20 April. Minor, low-level, plumes with low ash content were visible in webcam images through each day during 19-20 April, with occasional more energetic ash plumes. Read all

Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 13 April-19 April 2022 (Continuing Activity)

Wed, 20 Apr 2022, 19:08
AVO reported that low-level eruptive activity at Semisopochnoi's North Cerberus cone continued during 12-19 April. Periods of seismic tremor were detected daily and occasional small explosions were recorded in seismic and regional infrasound data on most days. Weather cloud cover often hindered webcam and satellite views; minor, low-level ash plumes were visible in webcam images during 16-19 April. Read all
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Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Current status: normal or dormant (1 out of 5) Semisopochnoi volcano eruptions:
2021, 2020, 2019, 2018, 1987
Typical eruption style
unspecified