Alaska earthquakes

M3.4 earthquake 289 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 289 km SE of Chiniak, Alaska on Sun, Aug 23, 2020, 3:04 AM AKDT (11:04 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.2 205 km SE of Chiniak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 3.4 (ml), minor
Local time: Sun, Aug 23, 2020, 3:04 AM AKDT
UTC: 2020-08-23 11:04:04 UTC
Depth: 7.0 km (4.4 mi), shallow
Epicenter: 55.669° N, 149.156° 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 11.1 km horizontally, 8.9 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 224°, poorly surrounded by stations
Stations used: 79

Nearby

Within 100 km, magnitude 1.5 and up: 24 in the 60 days after this one and 38 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bjd7 (also filed as ak020auhejgy). Read Fri, Sep 25, 2026, 7:13 PM UTC.