Alaska earthquakes

M5.1 earthquake 85 km SSE of Nikolski, Alaska

A magnitude 5.1 earthquake struck 85 km SSE of Nikolski, Alaska on Sat, Jan 27, 2018, 3:11 PM AKST (00:11 UTC), 19 km (12 mi) below the surface.

Unalaska forecast More in Alaska

Map

Where this earthquake was located, with the others nearby. Select one for its page.

Open the live map with earthquakes

The earthquake

Magnitude: 5.1 (mb, body-wave), moderate
Magnitude from: USGS National Earthquake Information Center
Local time: Sat, Jan 27, 2018, 3:11 PM AKST
UTC: 2018-01-28 00:11:29 UTC
Depth: 19.3 km (12.0 mi), shallow
Epicenter: 52.194° N, 168.580° 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
5.1	mb, body-wave	USGS National Earthquake Information Center	Preferred · Reviewed · ±0.047 · 145 stations
5.1	mb, body-wave	Alaska Earthquake 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.

Location uncertainty: About 5.0 km horizontally, 4.8 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 149°
Stations used: 208

Nearest places

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

Unalaska, AlaskaPopulation 4,491. Forecast232 kmSW

Nearby

Within 100 km, magnitude 2.1 and up: 40 in the 60 days after this one and 23 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 us2000cqhr (also filed as ak18213119, ak0181ab44xx). Read Thu, Oct 1, 2026, 1:50 PM UTC.