Alaska earthquakes

M2.9 earthquake 89 km NNE of Adak, Alaska

A magnitude 2.9 earthquake struck 89 km NNE of Adak, Alaska on Fri, Jul 30, 2021, 8:19 AM HADT (17:19 UTC), 212 km (131 mi) below the surface.

A larger quake followed: M4.3 116 km NW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.9 (ml), micro
Local time: Fri, Jul 30, 2021, 8:19 AM HADT
UTC: 2021-07-30 17:19:00 UTC
Depth: 211.6 km (131.5 mi), intermediate-depth
Epicenter: 52.572° N, 175.987° 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 18.4 km horizontally, 14.4 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 198°, poorly surrounded by stations
Stations used: 28

Nearby

Within 100 km, magnitude 1.5 and up: 51 in the 60 days after this one and 45 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 us6000f55z (also filed as ak0219p8mkxe). Read Thu, Sep 24, 2026, 1:38 PM UTC.