Alaska earthquakes

M3.8 earthquake 93 km SSE of Sand Point, Alaska

A magnitude 3.8 earthquake struck 93 km SSE of Sand Point, Alaska on Tue, Oct 27, 2020, 2:14 PM AKDT (22:14 UTC), 30 km (19 mi) below the surface.

A larger quake followed: M5.1 106 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: 3.8 (mwr), minor
Local time: Tue, Oct 27, 2020, 2:14 PM AKDT
UTC: 2020-10-27 22:14:21 UTC
Depth: 30.0 km (18.6 mi), shallow
Epicenter: 54.620° N, 159.731° 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: Strike-slip
Moment magnitude: 3.8 Mwr
Nodal plane 1: Strike 100°, dip 58°, rake 14°
Nodal plane 2: Strike 2°, dip 78°, rake 147°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 3.5 km horizontally, 5.7 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 170°
Stations used: 61

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast94 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000c6hs (also filed as ak020du5y1hy). Read Mon, Sep 28, 2026, 8:49 PM UTC.