Alaska earthquakes

M3.3 earthquake 253 km SE of Chiniak, Alaska

A magnitude 3.3 earthquake struck 253 km SE of Chiniak, Alaska on Tue, Mar 27, 2018, 6:49 PM AKDT (02:49 UTC), 24 km (15 mi) below the surface.

A larger quake followed: M5.5 276 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: 3.3 (ml), minor
Local time: Tue, Mar 27, 2018, 6:49 PM AKDT
UTC: 2018-03-28 02:49:37 UTC
Depth: 24.1 km (15.0 mi), shallow
Epicenter: 56.088° N, 149.185° 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 8.2 km horizontally, 9.9 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 179°
Stations used: 128

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 us1000dabw (also filed as ak18797386, ak0183zx8ng5). Read Sat, Sep 26, 2026, 7:10 AM UTC.