Alaska earthquakes

M3.4 earthquake 227 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 227 km SE of Chiniak, Alaska on Sun, Sep 30, 2018, 1:52 AM AKDT (09:52 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M3.7 261 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: 3.4 (ml), minor
Local time: Sun, Sep 30, 2018, 1:52 AM AKDT
UTC: 2018-09-30 09:52:55 UTC
Depth: 11.6 km (7.2 mi), shallow
Epicenter: 56.025° N, 149.940° 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 8.3 km horizontally, 8.6 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 215°, poorly surrounded by stations
Stations used: 62

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 us1000h9j4 (also filed as ak20267424, aacse018cjndx2e, ak018cjndx2e). Read Tue, Sep 22, 2026, 6:06 AM UTC.