Alaska earthquakes

M2.3 earthquake 16 km NNW of Willow, Alaska

A magnitude 2.3 earthquake struck 16 km NNW of Willow, Alaska on Tue, Sep 7, 2021, 6:21 PM AKDT (02:21 UTC), 40 km (25 mi) below the surface.

A larger quake followed: M3.9 35 km NE of Chase, Alaska. This one was a foreshock.

Willow forecast More in Alaska

Map

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

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The earthquake

Magnitude: 2.3 (ml), micro
Local time: Tue, Sep 7, 2021, 6:21 PM AKDT
UTC: 2021-09-08 02:21:59 UTC
Depth: 40.2 km (25.0 mi), shallow
Epicenter: 61.879° N, 150.191° 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.

Strongest estimated: I, not felt shaking
Peak ground acceleration: 0.0% of gravity
Peak ground velocity: -4.6 cm/s
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.

Stations used: 96

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 199 in the 60 days after this one and 122 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bj57lnm (also filed as us7000f93z). Read Sat, Sep 26, 2026, 4:38 AM UTC.