Alaska earthquakes

M3.9 earthquake 97 km SSE of Sand Point, Alaska

A magnitude 3.9 earthquake struck 97 km SSE of Sand Point, Alaska on Tue, Apr 27, 2021, 4:45 AM AKDT (12:45 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M4.1 115 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: 3.9 (mb), minor
Local time: Tue, Apr 27, 2021, 4:45 AM AKDT
UTC: 2021-04-27 12:45:11 UTC
Depth: 26.0 km (16.1 mi), shallow
Epicenter: 54.608° N, 159.644° 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 3.8 km horizontally, 6.3 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 163°
Stations used: 67

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast98 kmSE

Nearby

Within 100 km, magnitude 1.5 and up: 63 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of 63.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000dxuk (also filed as ak0215dpah92). Read Thu, Sep 24, 2026, 1:08 PM UTC.