Alaska earthquakes

M4.1 earthquake 262 km ESE of Chiniak, Alaska

A magnitude 4.1 earthquake struck 262 km ESE of Chiniak, Alaska on Fri, Feb 28, 2020, 5:05 AM AKST (14:05 UTC), 10 km (6 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: 4.1 (mb), light
Local time: Fri, Feb 28, 2020, 5:05 AM AKST
UTC: 2020-02-28 14:05:23 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.499° N, 148.466° 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 2.5 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.23
Depth from: Operator assigned
Station coverage gap: 147°
Stations used: 60

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 47 in the 60 days after this one and 16 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 us6000863h (also filed as ak0202pt2oia). Read Thu, Sep 24, 2026, 11:42 AM UTC.