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Semisopochnoi volcano
Stratovolcano 1221 m / 4,006 ft
United States, Aleutian Islands, 51.93°N / 179.58°E
Current status: restless (2 out of 5) Semisopochnoi volcano eruptions:
2021, 2020, 2019, 2018, 1987
Typical eruption style:

Semisopochnoi volcano news & activity updates:

Semisopochnoi volcano (Alaska): alert level raised to ORANGE

Tue, 9 Feb 2021, 08:42
08:42 AM | BY: T
The Alaska Volcano Observatory (AVO) raised the alert level of the volcano to ORANGE, after detecting evidence of continuing eruptions in the past days:
"High-resolution satellite imagery on February 7 shows a second small ash deposit extending at least 3 km to the northeast from North Cerberus Crater on Semisopochnoi Island, similar to the first observed on February 6.
"Clouds obscured views into the crater and the southern side of the volcano. Any ash clouds associated with these deposits have not been observed and are likely low-level (

Previous news

Mon, 8 Feb 2021, 09:14
Fresh ash deposits from North Cerebus Crater towards the N direction (image: AVO)
A satellite image from 6 February shows a fresh ash deposits visible on the snow cover likely generated by a small explosion in the last week as the Alaska Volcano Observatory (AVO) reported. The ash plume from North Cerebus Crater extended about 3 km to the north of the volcano. The height of the ash plume is unknown and was not reported. Visibility into the crater was very limited due to steam emissions. ... read all
Mon, 23 Nov 2020, 07:56
The Alaska Volcano Observatory (AVO) lowered the alert level of the volcano because no eruptive activity has been detected at since mid-June. ... read all
Thu, 2 Apr 2020, 07:28
The Alaska Volcano Observatory (AVO) lowered the alert level of the volcano because no signs of eruptive activity had been detected during the past two weeks: ... read all
Thu, 2 Apr 2020, 06:35
Steam plume from Semisopochnoi volcano from satellite (image: Sentinel 2)
The Alaska Volcano Observatory (AVO) reported that seismic, infrasound, and satellite data over the past two weeks have shown no signs of eruptive activity. ... read all
Fri, 20 Mar 2020, 05:14
AVO reports that activity continues at Semisopochnoi volcano. The seismicity levels remain elevated, but no significant activity was observed over the past 24 hours. No activity was observed in cloudy satellite imagery. ... read all

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