Alaska earthquakes

M4.3 earthquake 182 km S of Nikolski, Alaska

A magnitude 4.3 earthquake struck 182 km S of Nikolski, Alaska on Fri, Jul 31, 2020, 11:51 AM AKDT (19:51 UTC), 10 km (6 mi) below the surface.

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The earthquake

Magnitude: 4.3 (mb), light
Local time: Fri, Jul 31, 2020, 11:51 AM AKDT
UTC: 2020-07-31 19:51:39 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.307° N, 168.565° 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 6.4 km horizontally, 1.9 km in depth
Magnitude uncertainty: ±0.04
Depth from: Operator assigned
Station coverage gap: 138°
Stations used: 130

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 15 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 us6000b7lu (also filed as ak0209sl36ap). Read Tue, Sep 29, 2026, 10:28 PM UTC.