Alaska earthquakes

M3.5 earthquake 279 km ESE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 279 km ESE of Chiniak, Alaska on Mon, Dec 30, 2019, 4:03 PM AKST (01:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.1 270 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: 3.5 (ml), minor
Local time: Mon, Dec 30, 2019, 4:03 PM AKST
UTC: 2019-12-31 01:03:59 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.401° N, 148.243° 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 2.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.04
Depth from: Operator assigned
Station coverage gap: 207°, poorly surrounded by stations
Stations used: 107

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 20 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70006ss9 (also filed as ak019grnrz1j). Read Mon, Sep 28, 2026, 7:40 PM UTC.