Alaska earthquakes

M2.5 earthquake 102 km E of Nikolski, Alaska

A magnitude 2.5 earthquake struck 102 km E of Nikolski, Alaska on Mon, Nov 13, 2017, 10:58 PM AKST (07:58 UTC), 41 km (26 mi) below the surface.

A larger quake followed: M4.9 143 km SE of Nikolski, 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: 2.5 (ML, local (Richter)), micro
Magnitude from: USGS National Earthquake Information Center
Local time: Mon, Nov 13, 2017, 10:58 PM AKST
UTC: 2017-11-14 07:58:53 UTC
Depth: 41.2 km (25.6 mi), shallow
Epicenter: 52.810° N, 167.355° 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
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Preferred · Reviewed
2.5	ML, local (Richter)	Alaska Earthquake Center	Preliminary

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 8.2 km horizontally, 70.5 km in depth
Depth from: From location
Station coverage gap: 226°, poorly surrounded by stations
Stations used: 29

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast130 kmSSW

Nearby

Within 100 km, magnitude 1.5 and up: 71 in the 60 days after this one and 50 in the 30 days before it.

After

The first 60 of 71.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000bqrq (also filed as ak17208666, ak017em1exzl). Read Fri, Oct 2, 2026, 2:32 AM UTC.