Alaska earthquakes

M4.0 earthquake 248 km SE of Chiniak, Alaska

A magnitude 4.0 earthquake struck 248 km SE of Chiniak, Alaska on Sun, Sep 29, 2019, 8:45 AM AKDT (16:45 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M5.0 273 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: 4.0 (ml), light
Local time: Sun, Sep 29, 2019, 8:45 AM AKDT
UTC: 2019-09-29 16:45:00 UTC
Depth: 21.1 km (13.1 mi), shallow
Epicenter: 56.353° N, 148.909° 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 10.3 km horizontally, 11.9 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 259°, poorly surrounded by stations
Stations used: 32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 56 in the 60 days after this one and 27 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70005nj3 (also filed as ak019ci3yvrl). Read Tue, Sep 29, 2026, 8:57 AM UTC.