Alaska earthquakes

M2.8 earthquake 260 km ESE of Chiniak, Alaska

A magnitude 2.8 earthquake struck 260 km ESE of Chiniak, Alaska on Mon, Jul 19, 2021, 8:37 PM AKDT (04:37 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M3.1 269 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: Mon, Jul 19, 2021, 8:37 PM AKDT
UTC: 2021-07-20 04:37:27 UTC
Depth: 22.4 km (13.9 mi), shallow
Epicenter: 56.366° N, 148.657° W
Region: Alaska
Felt reports: 1
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 9.3 km horizontally, 10.7 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 189°, poorly surrounded by stations
Stations used: 38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 31 in the 60 days after this one and 25 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000enm4 (also filed as ak02198hmo8v). Read Thu, Sep 24, 2026, 3:01 AM UTC.