Alaska earthquakes

M3.0 earthquake 86 km ESE of Halibut Cove, Alaska

A magnitude 3.0 earthquake struck 86 km ESE of Halibut Cove, Alaska on Fri, May 21, 2021, 12:33 AM AKDT (08:33 UTC), 37 km (23 mi) below the surface.

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

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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: 3.0 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Fri, May 21, 2021, 12:33 AM AKDT
UTC: 2021-05-21 08:33:39 UTC
Depth: 36.7 km (22.8 mi), shallow
Epicenter: 59.239° N, 149.865° W
Region: Alaska
Tsunami flag: No
Status: Automatic solution, may be revised

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
3.0	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.036 · 104 stations

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: 49

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 11 in the 60 days after this one and 8 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0216hbqkec (also filed as us7000e4zq). Read Thu, Oct 1, 2026, 10:30 PM UTC.