Alaska earthquakes

M3.0 earthquake 210 km S of Atka, Alaska

A magnitude 3.0 earthquake struck 210 km S of Atka, Alaska on Fri, Jul 2, 2021, 2:08 PM HADT (23:08 UTC), 32 km (20 mi) below the surface.

A larger quake followed: M3.3 200 km SSE of Atka, Alaska. This one was a foreshock.

Map

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Fri, Jul 2, 2021, 2:08 PM HADT
UTC: 2021-07-02 23:08:17 UTC
Depth: 31.6 km (19.6 mi), shallow
Epicenter: 50.304° N, 174.083° 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 9.1 km horizontally, 15.5 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 237°, poorly surrounded by stations
Stations used: 25

Nearby

Within 100 km, magnitude 1.5 and up: 32 in the 60 days after this one and 3 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 us7000eidr (also filed as ak0218f139w8). Read Thu, Sep 24, 2026, 12:09 PM UTC.