Alaska earthquakes

M3.4 earthquake 241 km SE of Chiniak, Alaska

A magnitude 3.4 earthquake struck 241 km SE of Chiniak, Alaska on Wed, Oct 17, 2018, 2:09 AM AKDT (10:09 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.5 285 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: 3.4 (ml), minor
Local time: Wed, Oct 17, 2018, 2:09 AM AKDT
UTC: 2018-10-17 10:09:22 UTC
Depth: 9.2 km (5.7 mi), shallow
Epicenter: 55.865° N, 149.947° 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, 8.0 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 203°, poorly surrounded by stations
Stations used: 112

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 194 in the 60 days after this one and 5 in the 30 days before it.

After

The first 60 of 194.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hda5 (also filed as ak20285523, ak018dbruyou, aacse018dbruyou). Read Thu, Sep 24, 2026, 7:57 AM UTC.