Alaska earthquakes

M2.5 earthquake 265 km ESE of Chiniak, Alaska

A magnitude 2.5 earthquake struck 265 km ESE of Chiniak, Alaska on Sun, Apr 25, 2021, 12:10 PM AKDT (20:10 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.5 226 km SE of Chiniak, Alaska. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 2.5 (ml), micro
Local time: Sun, Apr 25, 2021, 12:10 PM AKDT
UTC: 2021-04-25 20:10:40 UTC
Depth: 20.2 km (12.5 mi), shallow
Epicenter: 56.346° N, 148.585° 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 9.1 km horizontally, 10.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 215°, poorly surrounded by stations
Stations used: 33

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 38 in the 60 days after this one and 22 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000e562 (also filed as ak0215airtbe). Read Thu, Sep 24, 2026, 11:11 AM UTC.