Alaska earthquakes

M2.6 earthquake 186 km ESE of Chiniak, Alaska

A magnitude 2.6 earthquake struck 186 km ESE of Chiniak, Alaska on Sun, Mar 4, 2018, 12:45 AM AKST (09:45 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: 2.6 (ml), micro
Local time: Sun, Mar 4, 2018, 12:45 AM AKST
UTC: 2018-03-04 09:45:35 UTC
Depth: 19.7 km (12.3 mi), shallow
Epicenter: 56.953° N, 149.438° 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 7.2 km horizontally, 9.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 217°, poorly surrounded by stations
Stations used: 38

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 us1000d2mh (also filed as ak18655495, ak0182wchhca). Read Sun, Sep 27, 2026, 2:48 PM UTC.