Past earthquakes near Semisopochnoi volcano: April 2022 - list, stats and map

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Updated: Apr 25, 2024 01:37 GMT - refresh

During April 2022, Semisopochnoi volcano has had 8 quakes of magnitudes up to 2.3:

1 quake above magnitude 2
7 quakes below magnitude 2 that people normally don't feel.

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Strongest: Mag. 2.3 Earthquake 248 km W of Adak, Alaska -

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Quakes, magnitude and depth over time

Depth and magnitude of quakes over time

Showing quakes magnitude 0.5 or higher, within up to 30 km (19 mi) distance (8 quakes):

Past earthquakes near Semisopochnoi volcano: April 2022 - list, stats and map
Date and Time	Mag Depth	Distance	Location	Details
Apr 28, 2022 05:55 pm (Adak)	0.2 7 km	2.6 km (1.6 mi) to the N	Rat Islands, Aleutian Islands, Alaska	Info
Thursday, April 28, 2022 GMT (4 quakes)
Apr 28, 2022 02:04 pm (Adak)	1.0 7.3 km	2.2 km (1.3 mi) to the NE	259 Km W of Adak, Alaska	Info
Apr 28, 2022 01:48 pm (Adak)	1.0 7.7 km	2.6 km (1.6 mi) to the NE	259 Km W of Adak, Alaska	Info
Apr 28, 2022 01:48 pm (Adak)	0.7 7.6 km	2 km (1.3 mi) to the N	259 Km W of Adak, Alaska	Info
Apr 28, 2022 01:47 pm (Adak)	0.6 7.7 km	2.1 km (1.3 mi) to the N	260 Km W of Adak, Alaska	Info
Thursday, April 14, 2022 GMT (1 quake)
Apr 13, 2022 06:19 pm (Adak)	2.3 155 km	23 km (14 mi) to the NE	248 km W of Adak, Alaska	Info
Friday, April 8, 2022 GMT (1 quake)
Apr 8, 2022 12:03 pm (Adak)	1.8 14 km	8 km (4.9 mi) to the SE	256 Km W of Adak, Alaska	Info
Tuesday, April 5, 2022 GMT (1 quake)
Apr 5, 2022 06:15 am (Adak)	1.5 13 km	5.1 km (3.2 mi) to the SW	263 km W of Adak, Alaska	Info

About these data

Estimated combined seismic energy released: 2.3 x 10⁸ joules (62.8 kilowatt hours) | about seismic energy

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

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

Sat, 5 Aug 2023, 19:55

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

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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