Alaska earthquakes

M4.3 earthquake 94 km NNE of Adak, Alaska

A magnitude 4.3 earthquake struck 94 km NNE of Adak, Alaska on Mon, Mar 29, 2021, 2:49 PM HADT (23:49 UTC), 211 km (131 mi) below the surface.

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The earthquake

Magnitude: 4.3 (mb), light
Local time: Mon, Mar 29, 2021, 2:49 PM HADT
UTC: 2021-03-29 23:49:04 UTC
Depth: 211.2 km (131.2 mi), intermediate-depth
Epicenter: 52.653° N, 176.076° 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 11.7 km horizontally, 9.1 km in depth
Magnitude uncertainty: ±0.06
Depth from: From location
Station coverage gap: 140°
Stations used: 139

Nearby

Within 100 km, magnitude 1.5 and up: 27 in the 60 days after this one and 9 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 us6000dxik (also filed as ak02141xa0vv). Read Sat, Sep 26, 2026, 5:20 AM UTC.