Alaska earthquakes

M3.9 earthquake 29 km W of Karluk, Alaska

A magnitude 3.9 earthquake struck 29 km W of Karluk, Alaska on Sun, Apr 30, 2017, 3:03 AM AKDT (11:03 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.2 25 km NNE of Karluk, Alaska. This one was a foreshock.

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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: 3.9 (ML, local (Richter)), minor
Magnitude from: Alaska Earthquake Center
Local time: Sun, Apr 30, 2017, 3:03 AM AKDT
UTC: 2017-04-30 11:03:56 UTC
Depth: 9.9 km (6.2 mi), shallow
Epicenter: 57.522° N, 154.937° W
Region: Alaska
Strongest shaking: II, weak shaking
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
3.9	ML, local (Richter)	Alaska Earthquake Center	Preferred · Preliminary
3.9	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed
4.0	ML, local (Richter)	USGS National Earthquake Information Center	Preliminary

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: II, weak shaking
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

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: 68

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 126 in the 60 days after this one and 61 in the 30 days before it.

After

The first 60 of 126.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0175in26g6 (also filed as ak15842584, us10008plc, us10008m6y). Read Sat, Oct 3, 2026, 5:35 PM UTC.