Alaska earthquakes

M3.4 earthquake Alaska Peninsula

A magnitude 3.4 earthquake struck in the Alaska Peninsula on Thu, Oct 22, 2020, 12:48 AM AKDT (08:48 UTC), 41 km (25 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: 3.4 (mb), minor
Local time: Thu, Oct 22, 2020, 12:48 AM AKDT
UTC: 2020-10-22 08:48:49 UTC
Depth: 40.7 km (25.3 mi), shallow
Epicenter: 55.200° N, 159.562° 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 1.8 km horizontally, 7.2 km in depth
Magnitude uncertainty: ±0.17
Depth from: From location
Station coverage gap: 83°
Stations used: 42

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast61 kmESE

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 us7000cb5b (also filed as ak020dlo4l7r). Read Sun, Sep 27, 2026, 7:14 AM UTC.