Alaska earthquakes

M3.3 earthquake 105 km SSE of Sand Point, Alaska

A magnitude 3.3 earthquake struck 105 km SSE of Sand Point, Alaska on Tue, Oct 20, 2020, 12:53 AM AKDT (08:53 UTC), 16 km (10 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: 3.3 (ml), minor
Local time: Tue, Oct 20, 2020, 12:53 AM AKDT
UTC: 2020-10-20 08:53:44 UTC
Depth: 16.1 km (10.0 mi), shallow
Epicenter: 54.532° N, 159.634° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.3 km horizontally, 9.3 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 204°, poorly surrounded by stations
Stations used: 41

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast105 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

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000c85y (also filed as ak020did2yc6). Read Wed, Sep 30, 2026, 6:54 PM UTC.