Alaska earthquakes

M3.3 earthquake 107 km SSE of Sand Point, Alaska

A magnitude 3.3 earthquake struck 107 km SSE of Sand Point, Alaska on Tue, Aug 3, 2021, 10:41 AM AKDT (18:41 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M3.5 123 km SSE of Perryville, 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: 3.3 (ml), minor
Local time: Tue, Aug 3, 2021, 10:41 AM AKDT
UTC: 2021-08-03 18:41:10 UTC
Depth: 19.6 km (12.2 mi), shallow
Epicenter: 54.495° N, 159.678° 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 5.7 km horizontally, 10.5 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 55

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast107 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 us6000f427 (also filed as ak0219vvi8ad). Read Wed, Sep 23, 2026, 2:30 PM UTC.