Alaska earthquakes

M2.4 earthquake 238 km SE of Chiniak, Alaska

A magnitude 2.4 earthquake struck 238 km SE of Chiniak, Alaska on Sun, Mar 18, 2018, 9:31 PM AKDT (05:31 UTC), 20 km (12 mi) below the surface.

A larger quake followed: M5.5 276 km ESE 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: 2.4 (ml), micro
Local time: Sun, Mar 18, 2018, 9:31 PM AKDT
UTC: 2018-03-19 05:31:25 UTC
Depth: 20.1 km (12.5 mi), shallow
Epicenter: 56.102° N, 149.506° 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 5.7 km horizontally, 10.9 km in depth
Magnitude uncertainty: ±0.09
Depth from: From location
Station coverage gap: 244°, poorly surrounded by stations
Stations used: 25

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 at least 200 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 us1000d9ky (also filed as ak18790255, ak0183l32xzd). Read Sun, Sep 27, 2026, 8:44 AM UTC.