Alaska earthquakes

M3.3 earthquake 218 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 218 km SE of Chiniak, Alaska on Fri, Aug 18, 2023, 9:22 AM AKDT (17:22 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.7 218 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: 3.3 (ml), minor
Local time: Fri, Aug 18, 2023, 9:22 AM AKDT
UTC: 2023-08-18 17:22:20 UTC
Depth: 14.2 km (8.8 mi), shallow
Epicenter: 56.150° N, 149.883° 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 8.3 km horizontally, 8.2 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 191°, poorly surrounded by stations
Stations used: 54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 17 in the 60 days after this one and 10 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000kpam (also filed as ak023aknuy2m). Read Wed, Sep 30, 2026, 3:49 AM UTC.