Alaska earthquakes

M3.3 earthquake 241 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 241 km SE of Chiniak, Alaska on Mon, Jul 16, 2018, 12:16 AM AKDT (08:16 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.4 258 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: Mon, Jul 16, 2018, 12:16 AM AKDT
UTC: 2018-07-16 08:16:04 UTC
Depth: 21.4 km (13.3 mi), shallow
Epicenter: 56.379° N, 149.003° 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 2.2 km horizontally, 10.1 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 91

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 us2000g96d (also filed as ak19875688, ak01891xqa5k, aacse01891xqa5k). Read Tue, Sep 22, 2026, 7:40 PM UTC.