Alaska earthquakes

M1.9 earthquake 12 km SW of Cantwell, Alaska

A magnitude 1.9 earthquake struck 12 km SW of Cantwell, Alaska on Thu, Sep 16, 2021, 9:32 PM AKDT (05:32 UTC), 84 km (52 mi) below the surface.

A larger quake followed: M4.4 60 km SSE of Cantwell, 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
1.9 (ml), micro
Local time
UTC
2021-09-17 05:32:59 UTC
Depth
83.9 km (52.1 mi), intermediate-depth
Epicenter
63.301° N, 149.093° 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
72

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 88 in the 30 days before it.

After

The first 60 of 198.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021by2wdws. Read Sun, Sep 27, 2026, 11:04 AM UTC.