Alaska earthquakes

M3.3 earthquake 181 km SSE of Old Harbor, Alaska

A magnitude 3.3 earthquake struck 181 km SSE of Old Harbor, Alaska on Sat, Feb 10, 2018, 2:43 AM AKST (11:43 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.6 105 km SSE of Akhiok, Alaska. This one was a foreshock.

Womens Bay 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: 3.3 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Sat, Feb 10, 2018, 2:43 AM AKST
UTC: 2018-02-10 11:43:01 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.754° N, 151.947° 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
3.3	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.064 · 32 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: 43

Nearest places

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

Womens Bay, AlaskaPopulation 719. Forecast219 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 39 in the 60 days after this one and 31 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0181vzu7u7 (also filed as ak18420766, us2000d52u). Read Mon, Oct 5, 2026, 3:20 AM UTC.