Alaska earthquakes

M3.6 earthquake 140 km SSE of Sand Point, Alaska

A magnitude 3.6 earthquake struck 140 km SSE of Sand Point, Alaska on Sun, Feb 28, 2021, 7:28 PM AKST (04:28 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M4.4 122 km SSE 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: 3.6 (mb), minor
Local time: Sun, Feb 28, 2021, 7:28 PM AKST
UTC: 2021-03-01 04:28:39 UTC
Depth: 23.9 km (14.8 mi), shallow
Epicenter: 54.161° N, 159.691° 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 3.7 km horizontally, 13.2 km in depth
Magnitude uncertainty: ±0.25
Depth from: From location
Station coverage gap: 219°, poorly surrounded by stations
Stations used: 25

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: at least 201 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dlbs (also filed as ak0212rasn9d, ak0212rasn8r). Read Fri, Sep 25, 2026, 11:57 PM UTC.