Alaska earthquakes

M2.5 earthquake 219 km SE of Old Harbor, Alaska

A magnitude 2.5 earthquake struck 219 km SE of Old Harbor, Alaska on Mon, Apr 30, 2018, 1:47 PM AKDT (21:47 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 223 km SE of Chiniak, 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: 2.5 (ml), micro
Local time: Mon, Apr 30, 2018, 1:47 PM AKDT
UTC: 2018-04-30 21:47:11 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 55.722° N, 150.952° 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 10.6 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.09
Depth from: Operator assigned
Station coverage gap: 260°, poorly surrounded by stations
Stations used: 35

Nearest places

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

Womens Bay, AlaskaPopulation 719. Forecast242 kmSSE

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 132 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000dwfq (also filed as ak19304276, ak0185it9uk4). Read Wed, Sep 30, 2026, 9:19 AM UTC.