Alaska earthquakes

M3.3 earthquake 144 km SSE of Chignik, Alaska

A magnitude 3.3 earthquake struck 144 km SSE of Chignik, Alaska on Mon, Aug 16, 2021, 4:19 AM AKDT (12:19 UTC), 9 km (5 mi) below the surface.

A larger quake followed: M5.6 181 km SE of Chignik, 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: 3.3 (ml), minor
Local time: Mon, Aug 16, 2021, 4:19 AM AKDT
UTC: 2021-08-16 12:19:42 UTC
Depth: 8.8 km (5.5 mi), shallow
Epicenter: 55.213° N, 157.118° 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: 85

Nearest places

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

Sand Point, AlaskaPopulation 1,064. Forecast215 kmE

Nearby

Within 100 km, magnitude 1.5 and up: 176 in the 60 days after this one and at least 200 in the 30 days before it.

After

The first 60 of 176.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021ah9shst (also filed as us6000f6ya). Read Sun, Sep 27, 2026, 4:05 PM UTC.