Alaska earthquakes

M1.6 earthquake 63 km WNW of Tyonek, Alaska

A magnitude 1.6 earthquake struck 63 km WNW of Tyonek, Alaska on Thu, Oct 21, 2021, 4:50 PM AKDT (00:50 UTC), 119 km (74 mi) below the surface.

A larger quake followed: M3.4 19 km NNW of Susitna, Alaska. This one was a foreshock.

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

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-10-22 00:50:38 UTC
Depth
119.2 km (74.1 mi), intermediate-depth
Epicenter
61.266° N, 152.240° 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
24

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 201 in the 60 days after this one and 116 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021djvu6fm. Read Thu, Sep 24, 2026, 1:59 PM UTC.