Alaska earthquakes

M2.8 earthquake 235 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 235 km SE of Chiniak, Alaska on Thu, Feb 20, 2020, 2:05 PM AKST (23:05 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M5.2 250 km ESE 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: 2.8 (ml), micro
Local time: Thu, Feb 20, 2020, 2:05 PM AKST
UTC: 2020-02-20 23:05:25 UTC
Depth: 11.7 km (7.2 mi), shallow
Epicenter: 55.947° N, 149.892° 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 8.6 km horizontally, 8.5 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 221°, poorly surrounded by stations
Stations used: 59

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 42 in the 60 days after this one and 17 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us60008964 (also filed as ak0202cq4va7). Read Fri, Sep 25, 2026, 8:22 PM UTC.