Alaska earthquakes

M3.4 earthquake 252 km ESE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 252 km ESE of Chiniak, Alaska on Mon, Mar 5, 2018, 11:01 PM AKST (08:01 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M5.4 252 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: Mon, Mar 5, 2018, 11:01 PM AKST
UTC: 2018-03-06 08:01:38 UTC
Depth: 23.5 km (14.6 mi), shallow
Epicenter: 56.499° N, 148.659° 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, 8.7 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 202°, poorly surrounded by stations
Stations used: 106

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 us1000d43u (also filed as ak0182zmpbsm, ak18598768). Read Sun, Sep 27, 2026, 2:48 PM UTC.