Alaska earthquakes

M3.2 earthquake 218 km SSW of Nikolski, Alaska

A magnitude 3.2 earthquake struck 218 km SSW of Nikolski, Alaska on Thu, Sep 24, 2020, 5:43 AM HADT (14:43 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.5 129 km SSW of Nikolski, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.2 (ml), minor
Local time: Thu, Sep 24, 2020, 5:43 AM HADT
UTC: 2020-09-24 14:43:31 UTC
Depth: 10.0 km (6.2 mi), shallow
Epicenter: 51.089° N, 169.909° 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 5.2 km horizontally, 2.0 km in depth
Magnitude uncertainty: ±0.13
Depth from: Operator assigned
Station coverage gap: 229°, poorly surrounded by stations
Stations used: 21

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 2 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 us6000c5us (also filed as ak020cbgmda7). Read Tue, Sep 29, 2026, 9:46 PM UTC.