Alaska earthquakes

M2.8 earthquake 242 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 242 km SE of Chiniak, Alaska on Sun, Sep 30, 2018, 1:04 AM AKDT (09:04 UTC), 21 km (13 mi) below the surface.

A larger quake followed: M4.8 218 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: 2.8 (ml), micro
Local time: Sun, Sep 30, 2018, 1:04 AM AKDT
UTC: 2018-09-30 09:04:53 UTC
Depth: 20.6 km (12.8 mi), shallow
Epicenter: 56.177° N, 149.292° 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 3.6 km horizontally, 10.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 196°, poorly surrounded by stations
Stations used: 50

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 199 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of at least 199.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000h9j3 (also filed as ak20274974, aacse018cjn3mgd, ak018cjn3mgd). Read Mon, Sep 28, 2026, 4:30 AM UTC.