Alaska earthquakes

M3.5 earthquake 249 km SE of Chiniak, Alaska

A magnitude 3.5 earthquake struck 249 km SE of Chiniak, Alaska on Sat, Feb 24, 2018, 9:11 AM AKST (18:11 UTC), 26 km (16 mi) below the surface.

A larger quake followed: M5.4 252 km ESE of Chiniak, Alaska. This one was a foreshock.

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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: Sat, Feb 24, 2018, 9:11 AM AKST
UTC: 2018-02-24 18:11:25 UTC
Depth: 26.2 km (16.3 mi), shallow
Epicenter: 56.373° N, 148.855° 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 5.0 km horizontally, 9.5 km in depth
Magnitude uncertainty: ±0.04
Depth from: From location
Station coverage gap: 171°
Stations used: 149

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 202 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 202.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000dc3u (also filed as ak18513734, ak0182j9cb6a). Read Mon, Sep 28, 2026, 12:03 AM UTC.