Alaska earthquakes

M2.8 earthquake 240 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 240 km SE of Chiniak, Alaska on Wed, Jul 4, 2018, 5:43 PM AKDT (01:43 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M3.4 195 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: Wed, Jul 4, 2018, 5:43 PM AKDT
UTC: 2018-07-05 01:43:20 UTC
Depth: 20.5 km (12.7 mi), shallow
Epicenter: 56.233° N, 149.248° 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 8.4 km horizontally, 10.7 km in depth
Magnitude uncertainty: ±0.08
Depth from: From location
Station coverage gap: 190°, poorly surrounded by stations
Stations used: 29

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 us2000g1sc (also filed as ak19855605, aacse0188jmt939, ak0188jmt939). Read Mon, Sep 21, 2026, 4:02 PM UTC.