Alaska earthquakes

M3.2 earthquake 237 km SE of Chiniak, Alaska

A magnitude 3.2 earthquake struck 237 km SE of Chiniak, Alaska on Fri, Aug 10, 2018, 9:37 AM AKDT (17:37 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.9 250 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: 3.2 (ml), minor
Local time: Fri, Aug 10, 2018, 9:37 AM AKDT
UTC: 2018-08-10 17:37:53 UTC
Depth: 9.6 km (6.0 mi), shallow
Epicenter: 55.893° N, 149.975° 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 8.0 km horizontally, 7.1 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 216°, poorly surrounded by stations
Stations used: 85

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 184 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000gbuf (also filed as ak20054421, aacse018a7fngxz, ak018a7fngxz). Read Tue, Sep 29, 2026, 12:49 PM UTC.