Alaska earthquakes

M2.8 earthquake 217 km SE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 217 km SE of Chiniak, Alaska on Fri, Jul 27, 2018, 7:45 PM AKDT (03:45 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M4.9 250 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: Fri, Jul 27, 2018, 7:45 PM AKDT
UTC: 2018-07-28 03:45:03 UTC
Depth: 25.1 km (15.6 mi), shallow
Epicenter: 56.076° N, 150.085° 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 9.6 km horizontally, 16.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 210°, poorly surrounded by stations
Stations used: 35

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 201 in the 60 days after this one and 170 in the 30 days before it.

After

The first 60 of at least 201.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000g37j (also filed as ak20005233, ak0189lpdhp0, aacse0189lpdhp0). Read Mon, Sep 28, 2026, 5:03 PM UTC.