Alaska earthquakes

M1.8 earthquake 36 km SSE of Atka, Alaska

A magnitude 1.8 earthquake struck 36 km SSE of Atka, Alaska on Sun, Jul 11, 2021, 9:38 PM HADT (06:38 UTC), 122 km (75 mi) below the surface.

A larger quake followed: M4.7 67 km ESE of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.8 (ml), micro
Local time
UTC
2021-07-12 06:38:03 UTC
Depth
121.5 km (75.5 mi), intermediate-depth
Epicenter
51.876° N, 174.058° 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.

Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 151 in the 60 days after this one and 34 in the 30 days before it.

After

The first 60 of 151.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0218vairj6. Read Thu, Oct 1, 2026, 2:13 AM UTC.