Alaska earthquakes

M3.0 earthquake 276 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 276 km ESE of Chiniak, Alaska on Wed, Mar 7, 2018, 9:34 PM AKST (06:34 UTC), 20 km (12 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: 3.0 (ml), minor
Local time: Wed, Mar 7, 2018, 9:34 PM AKST
UTC: 2018-03-08 06:34:06 UTC
Depth: 20.0 km (12.4 mi), shallow
Epicenter: 56.347° N, 148.369° 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 10.4 km horizontally, 11.4 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 221°, poorly surrounded by stations
Stations used: 48

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 us1000d3l9 (also filed as ak18693087, ak01832ws5s9). Read Sun, Sep 27, 2026, 2:51 PM UTC.