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

Updated: Mar 28, 2024 10:42 GMT-

Semisopochnoi volcano (Aleutian Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 2 August-8 August 2023 (Continuing Activity)

Wed, 9 Aug 2023, 14:00
AVO reported that the last time possible explosions were detected at Semisopochnoi's Mount Young in monitoring data was 25 April and the last ash emission occurred on 5 May. Since then, earthquake activity has been low and steaming from the N crater continued. On 3 August the Volcano Alert Level was lowered to Normal (the lowest level on a four-level scale) and the Aviation Color Code was lowered to Green (the lowest color on a four-color scale). Read all

Semisopochnoi volcano (Aleutian Islands): alert status lowered to Green

Sat, 5 Aug 2023, 19:55
Semisopochnoi volcano (image: AVO)
Semisopochnoi volcano (image: AVO)
The alert status for the volcano was lowered to "green", as no eruptive signs of the activity have been detected since 5 May, nor any signal of volcanic unrest. 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