Alaska earthquakes

M2.8 earthquake 83 km SW of Nikolski, Alaska

A magnitude 2.8 earthquake struck 83 km SW of Nikolski, Alaska on Fri, Sep 29, 2017, 3:07 AM AKDT (11:07 UTC), 238 km (148 mi) below the surface.

A larger quake followed: M4.9 137 km SW of Nikolski, Alaska. This one was a foreshock.

Unalaska forecastMore 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
2.8 (ML, local (Richter)), micro
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-09-29 11:07:15 UTC
Depth
238.4 km (148.1 mi), intermediate-depth
Epicenter
52.328° N, 169.565° 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 15.3 km horizontally, 10.6 km in depth
Depth from
From location
Station coverage gap
219°, poorly surrounded by stations
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 60 in the 60 days after this one and 37 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us2000b16q. Read Fri, Oct 2, 2026, 7:25 AM UTC.