Alaska earthquakes

M3.0 earthquake 256 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 256 km ESE of Chiniak, Alaska on Thu, Aug 2, 2018, 11:48 PM AKDT (07:48 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.1 260 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: 3.0 (ml), minor
Local time: Thu, Aug 2, 2018, 11:48 PM AKDT
UTC: 2018-08-03 07:48:09 UTC
Depth: 22.3 km (13.9 mi), shallow
Epicenter: 56.498° N, 148.583° 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 9.0 km horizontally, 10.9 km in depth
Magnitude uncertainty: ±0.07
Depth from: From location
Station coverage gap: 215°, poorly surrounded by stations
Stations used: 32

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 us1000g556 (also filed as ak20026081, aacse0189vozyr7, ak0189vozyr7). Read Tue, Sep 22, 2026, 4:16 AM UTC.