Alaska earthquakes

M4.3 earthquake 225 km W of Adak, Alaska

A magnitude 4.3 earthquake struck 225 km W of Adak, Alaska on Wed, Mar 10, 2021, 7:46 PM HAST (05:46 UTC), 158 km (98 mi) below the surface.

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The earthquake

Magnitude: 4.3 (mb), light
Local time: Wed, Mar 10, 2021, 7:46 PM HAST
UTC: 2021-03-11 05:46:38 UTC
Depth: 158.0 km (98.2 mi), intermediate-depth
Epicenter: 51.973° N, 179.910° 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 11.4 km horizontally, 7.0 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 177°
Stations used: 142

Nearby

Within 100 km, magnitude 1.5 and up: 24 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 us7000di1n (also filed as ak02137uvg12). Read Sun, Sep 27, 2026, 4:27 AM UTC.