Alaska earthquakes

M3.0 earthquake 253 km ESE of Chiniak, Alaska

A magnitude 3.0 earthquake struck 253 km ESE of Chiniak, Alaska on Sat, Oct 6, 2018, 1:36 PM AKDT (21:36 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M3.1 257 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: 3.0 (ml), minor
Local time: Sat, Oct 6, 2018, 1:36 PM AKDT
UTC: 2018-10-06 21:36:49 UTC
Depth: 20.7 km (12.8 mi), shallow
Epicenter: 56.524° N, 148.613° 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, 10.9 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 214°, poorly surrounded by stations
Stations used: 54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 186 in the 60 days after this one and 13 in the 30 days before it.

After

The first 60 of 186.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hbvi (also filed as ak018ctrnr8z, ak20272332, aacse018ctrnr8z). Read Tue, Sep 22, 2026, 3:08 PM UTC.