Alaska earthquakes

M3.9 earthquake 141 km SE of Chignik, Alaska

A magnitude 3.9 earthquake struck 141 km SE of Chignik, Alaska on Wed, Jul 28, 2021, 11:21 PM AKDT (07:21 UTC), 25 km (16 mi) below the surface.

A larger quake followed: M6.9 125 km SE of Perryville, Alaska. This one was a foreshock.

Sand Point forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 3.9 (ml), minor
Local time: Wed, Jul 28, 2021, 11:21 PM AKDT
UTC: 2021-07-29 07:21:11 UTC
Depth: 25.3 km (15.7 mi), shallow
Epicenter: 55.503° N, 156.640° 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.

Stations used: 27

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast244 kmE

Nearby

Within 100 km, magnitude 1.5 and up: at least 201 in the 60 days after this one and 40 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0219nf5fuj (also filed as us6000f2fm). Read Thu, Sep 24, 2026, 4:18 PM UTC.