Alaska earthquakes

M2.8 earthquake 120 km WSW of Nikolski, Alaska

A magnitude 2.8 earthquake struck 120 km WSW of Nikolski, Alaska on Wed, Nov 18, 2020, 11:55 PM HAST (09:55 UTC), 25 km (15 mi) below the surface.

A larger quake followed: M4.5 104 km SSW of Nikolski, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 2.8 (ml), micro
Local time: Wed, Nov 18, 2020, 11:55 PM HAST
UTC: 2020-11-19 09:55:34 UTC
Depth: 24.9 km (15.5 mi), shallow
Epicenter: 52.483° N, 170.480° 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 5.4 km horizontally, 11.4 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 204°, poorly surrounded by stations
Stations used: 17

Nearby

Within 100 km, magnitude 1.5 and up: 40 in the 60 days after this one and 10 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 us7000cmsj (also filed as ak020evzt7c5). Read Mon, Sep 28, 2026, 1:06 PM UTC.