Alaska earthquakes

M4.4 earthquake 89 km E of Nikolski, Alaska

A magnitude 4.4 earthquake struck 89 km E of Nikolski, Alaska on Thu, May 17, 2018, 11:41 AM AKDT (19:41 UTC), 47 km (29 mi) below the surface.

A larger quake followed: M4.6 135 km S of Unalaska, Alaska. This one was a foreshock.

Unalaska 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: 4.4 (mb, body-wave), light
Magnitude from: USGS National Earthquake Information Center
Local time: Thu, May 17, 2018, 11:41 AM AKDT
UTC: 2018-05-17 19:41:11 UTC
Depth: 47.2 km (29.3 mi), shallow
Epicenter: 52.951° N, 167.530° W
Region: Alaska
Felt reports: 1
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
4.4	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.047 · 129 stations
4.4	mb, body-wave	Alaska Earthquake Center	Preliminary

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.3 km horizontally, 3.1 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 171°
Stations used: 97

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast122 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 60 in the 60 days after this one and 34 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 us1000e7hf (also filed as ak0186aw6l9r, ak19632271). Read Thu, Oct 1, 2026, 6:06 PM UTC.