Alaska earthquakes

M2.8 earthquake 223 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 223 km SE of Chiniak, Alaska on Sat, Jul 21, 2018, 12:02 PM AKDT (20:02 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M3.0 232 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: 2.8 (ml), micro
Local time: Sat, Jul 21, 2018, 12:02 PM AKDT
UTC: 2018-07-21 20:02:24 UTC
Depth: 20.4 km (12.7 mi), shallow
Epicenter: 56.480° N, 149.245° 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 7.5 km horizontally, 8.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 186°, poorly surrounded by stations
Stations used: 43

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 us2000gdzl (also filed as ak19935050, ak0189aeh9c7, aacse0189aeh9c7). Read Tue, Sep 22, 2026, 11:08 AM UTC.