Alaska earthquakes

M4.9 earthquake 125 km SSW of Nikolski, Alaska

A magnitude 4.9 earthquake struck 125 km SSW of Nikolski, Alaska on Fri, Oct 9, 2020, 10:41 PM AKDT (06:41 UTC), 10 km (6 mi) below the surface.

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The earthquake

Magnitude: 4.9 (mb), light
Local time: Fri, Oct 9, 2020, 10:41 PM AKDT
UTC: 2020-10-10 06:41:26 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.919° N, 169.633° 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 4.6 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.08
Depth from: Operator assigned
Station coverage gap: 184°, poorly surrounded by stations
Stations used: 150

Nearby

Within 100 km, magnitude 1.9 and up: 23 in the 60 days after this one and 18 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 us6000c792 (also filed as ak020d1sg0sn). Read Wed, Sep 30, 2026, 3:59 AM UTC.