Alaska earthquakes

M3.5 earthquake 189 km SSE of Old Harbor, Alaska

A magnitude 3.5 earthquake struck 189 km SSE of Old Harbor, Alaska on Sun, Feb 18, 2018, 8:59 AM AKST (17:59 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: 3.5 (ml), minor
Local time: Sun, Feb 18, 2018, 8:59 AM AKST
UTC: 2018-02-18 17:59:45 UTC
Depth: 10.4 km (6.5 mi), shallow
Epicenter: 55.678° N, 151.940° 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.

Location uncertainty: About 7.5 km horizontally, 7.8 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 194°, poorly surrounded by stations
Stations used: 77

Nearest places

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

Womens Bay, AlaskaPopulation 719. Forecast227 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 30 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 us2000d49n (also filed as ak18450197, ak01829bt4hs). Read Mon, Sep 28, 2026, 10:11 AM UTC.