Alaska earthquakes

M3.4 earthquake 253 km ESE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 253 km ESE of Chiniak, Alaska on Sat, Mar 10, 2018, 6:14 AM AKST (15:14 UTC), 22 km (14 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: 3.4 (ml), minor
Local time: Sat, Mar 10, 2018, 6:14 AM AKST
UTC: 2018-03-10 15:14:34 UTC
Depth: 22.1 km (13.7 mi), shallow
Epicenter: 56.461° N, 148.672° 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 7.1 km horizontally, 10.5 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 202°, poorly surrounded by stations
Stations used: 76

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 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000d4j5 (also filed as ak18663985, ak01836d3j2z). Read Sun, Sep 27, 2026, 12:44 PM UTC.