Alaska earthquakes

M2.9 earthquake 227 km SE of Chiniak, Alaska

A magnitude 2.9 earthquake struck 227 km SE of Chiniak, Alaska on Mon, Apr 9, 2018, 3:12 AM AKDT (11:12 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.6 229 km SE 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: 2.9 (ml), micro
Local time: Mon, Apr 9, 2018, 3:12 AM AKDT
UTC: 2018-04-09 11:12:29 UTC
Depth: 6.9 km (4.3 mi), shallow
Epicenter: 55.987° N, 150.028° 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 8.1 km horizontally, 8.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 213°, poorly surrounded by stations
Stations used: 81

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 200 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 200.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000e04x (also filed as ak0184jwtrsg, ak19234741). Read Fri, Sep 25, 2026, 4:17 PM UTC.