Alaska earthquakes

M3.4 earthquake 234 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 234 km SE of Chiniak, Alaska on Mon, Mar 5, 2018, 9:19 PM AKST (06:19 UTC), 8 km (5 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, 9:19 PM AKST
UTC: 2018-03-06 06:19:10 UTC
Depth: 8.1 km (5.0 mi), shallow
Epicenter: 55.982° N, 149.842° 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 8.4 km horizontally, 8.3 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 57

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 us1000d43t (also filed as ak18597638, ak0182zlm9kw). Read Sun, Sep 27, 2026, 12:41 PM UTC.