Alaska earthquakes

M4.2 earthquake 243 km ESE of Chiniak, Alaska

A magnitude 4.2 earthquake struck 243 km ESE of Chiniak, Alaska on Thu, Feb 28, 2019, 6:41 PM AKST (03:41 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.8 232 km SE of Chiniak, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 4.2 (mb), light
Local time: Thu, Feb 28, 2019, 6:41 PM AKST
UTC: 2019-03-01 03:41:01 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.445° N, 148.886° W
Region: Alaska
Felt reports: 2
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

2 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 4.9 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 144°
Stations used: 44

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000j947 (also filed as aacse0192ra9wyr, ak0192ra9wyr). Read Tue, Sep 22, 2026, 3:36 PM UTC.