Alaska earthquakes

M3.5 earthquake 63 km WNW of Happy Valley, Alaska

A magnitude 3.5 earthquake struck 63 km WNW of Happy Valley, Alaska on Thu, May 13, 2021, 7:28 PM AKDT (03:28 UTC), 115 km (71 mi) below the surface.

A larger quake followed: M4.3 25 km W of Salamatof, 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: 3.5 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Thu, May 13, 2021, 7:28 PM AKDT
UTC: 2021-05-14 03:28:28 UTC
Depth: 115.0 km (71.5 mi), intermediate-depth
Epicenter: 60.157° N, 152.788° W
Region: Alaska
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
3.5	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.029 · 154 stations

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: 227

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 200 in the 60 days after this one and 154 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak02165nyv9d (also filed as us7000e2yz). Read Fri, Oct 2, 2026, 10:08 PM UTC.