Alaska earthquakes

M3.1 earthquake 141 km SSE of Sand Point, Alaska

A magnitude 3.1 earthquake struck 141 km SSE of Sand Point, Alaska on Tue, Aug 24, 2021, 4:31 AM AKDT (12:31 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M3.4 173 km SE of Sand Point, Alaska. This one was a foreshock.

Sand Point forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.1 (ml), minor
Local time: Tue, Aug 24, 2021, 4:31 AM AKDT
UTC: 2021-08-24 12:31:18 UTC
Depth: 20.1 km (12.5 mi), shallow
Epicenter: 54.177° N, 159.599° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 6.0 km horizontally, 12.7 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 209°, poorly surrounded by stations
Stations used: 57

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Sand Point, AlaskaPopulation 1,064. Forecast141 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000f7rj (also filed as ak021aui5sls). Read Wed, Sep 23, 2026, 4:42 AM UTC.