Alaska earthquakes

M3.0 earthquake 257 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 257 km ESE of Chiniak, Alaska on Mon, May 28, 2018, 9:56 AM AKDT (17:56 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.1 251 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: 3.0 (ml), minor
Local time: Mon, May 28, 2018, 9:56 AM AKDT
UTC: 2018-05-28 17:56:03 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.409° N, 148.668° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.3 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: Operator assigned
Station coverage gap: 188°, poorly surrounded by stations
Stations used: 62

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 us1000eiak (also filed as ak0186t1zr3a, ak19679755, aacse0186t1zr3a). Read Tue, Sep 22, 2026, 11:32 AM UTC.