Alaska earthquakes

M4.1 earthquake 257 km SE of Chiniak, Alaska

A magnitude 4.1 earthquake struck 257 km SE of Chiniak, Alaska on Mon, Nov 22, 2021, 10:17 PM AKST (07:17 UTC), 10 km (6 mi) below the surface.

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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: 4.1 (mb), light
Local time: Mon, Nov 22, 2021, 10:17 PM AKST
UTC: 2021-11-23 07:17:29 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 56.275° N, 148.824° W
Region: Alaska
Strongest shaking: I, not felt shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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 7.2 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.15
Depth from: Operator assigned
Station coverage gap: 83°
Stations used: 65

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 12 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fwe1 (also filed as ak021f0x08c3). Read Wed, Sep 23, 2026, 10:18 PM UTC.