Alaska earthquakes

M1.8 earthquake 58 km WNW of Happy Valley, Alaska

A magnitude 1.8 earthquake struck 58 km WNW of Happy Valley, Alaska on Sat, Sep 11, 2021, 12:50 AM AKDT (08:50 UTC), 100 km (62 mi) below the surface.

Automatic solution: the magnitude and location may still be revised.

A larger quake followed: M4.7 12 km SSW of Clam Gulch, Alaska. This one was a foreshock.

Happy Valley 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: 1.8 (ml), micro
Local time: Sat, Sep 11, 2021, 12:50 AM AKDT
UTC: 2021-09-11 08:50:44 UTC
Depth: 100.3 km (62.3 mi), intermediate-depth
Epicenter: 60.059° N, 152.756° W
Region: Alaska
Tsunami flag: No
Status: Automatic solution, may be revised

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

An automatic solution; a seismologist may revise it.

Stations used: 32

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 202 in the 60 days after this one and 190 in the 30 days before it.

After

The first 60 of at least 202.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bo7kfcb. Read Mon, Sep 28, 2026, 10:20 PM UTC.