Alaska earthquakes

M3.5 earthquake 259 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 259 km SE of Chiniak, Alaska on Wed, Oct 10, 2018, 6:27 AM AKDT (14:27 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.6 234 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, Oct 10, 2018, 6:27 AM AKDT
UTC: 2018-10-10 14:27:28 UTC
Depth: 20.5 km (12.8 mi), shallow
Epicenter: 56.306° N, 148.755° 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 7.8 km horizontally, 10.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 64

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 us1000ha8p (also filed as ak018d09l4v4, ak20275757, aacse018d09l4v4). Read Tue, Sep 22, 2026, 9:36 AM UTC.