Alaska earthquakes

M3.5 earthquake 243 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 243 km SE of Chiniak, Alaska on Wed, Dec 5, 2018, 10:01 PM AKST (07:01 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M3.7 235 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: Wed, Dec 5, 2018, 10:01 PM AKST
UTC: 2018-12-06 07:01:15 UTC
Depth: 15.0 km (9.3 mi), shallow
Epicenter: 55.990° N, 149.615° 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, 7.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 201°, poorly surrounded by stations
Stations used: 95

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 168 in the 60 days after this one and 31 in the 30 days before it.

After

The first 60 of 168.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000i3r4 (also filed as ak018fmewab6, ak20448996, aacse018fmewab6). Read Tue, Sep 22, 2026, 8:03 AM UTC.