Alaska earthquakes

M4.5 earthquake 229 km SE of Chiniak, Alaska

A magnitude 4.5 earthquake struck 229 km SE of Chiniak, Alaska on Mon, Mar 12, 2018, 6:13 PM AKDT (02:13 UTC), 14 km (9 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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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 4.5 (mb), light
Local time: Mon, Mar 12, 2018, 6:13 PM AKDT
UTC: 2018-03-13 02:13:43 UTC
Depth: 14.4 km (8.9 mi), shallow
Epicenter: 55.996° N, 149.943° 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 3.4 km horizontally, 5.3 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 159°
Stations used: 261

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000d3mt (also filed as ak0183b3yqoy, ak18693240). Read Mon, Sep 21, 2026, 2:55 AM UTC.