Alaska earthquakes

M4.4 earthquake 54 km SSE of Sand Point, Alaska

A magnitude 4.4 earthquake struck 54 km SSE of Sand Point, Alaska on Mon, Dec 21, 2020, 2:57 AM AKST (11:57 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M4.8 75 km ESE of King Cove, 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: 4.4 (mwr), light
Local time: Mon, Dec 21, 2020, 2:57 AM AKST
UTC: 2020-12-21 11:57:47 UTC
Depth: 37.9 km (23.6 mi), shallow
Epicenter: 54.860° N, 160.310° 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Moment magnitude: 4.4 Mwr
Nodal plane 1: Strike 37°, dip 82°, rake 104°
Nodal plane 2: Strike 155°, dip 16°, rake 29°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.9 km horizontally, 4.6 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 84°
Stations used: 102

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast54 kmSSE

Nearby

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

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000csxc (also filed as ak020gcy7mxq). Read Sun, Sep 27, 2026, 7:24 AM UTC.