Alaska earthquakes

M1.9 earthquake 51 km ENE of Adak, Alaska

A magnitude 1.9 earthquake struck 51 km ENE of Adak, Alaska on Sun, Sep 5, 2021, 2:05 AM HADT (11:05 UTC), 163 km (101 mi) below the surface.

A larger quake followed: M3.3 67 km ESE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.9 (ml), micro
Local time
UTC
2021-09-05 11:05:36 UTC
Depth
162.7 km (101.1 mi), intermediate-depth
Epicenter
52.079° N, 175.956° 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: 91 in the 60 days after this one and 77 in the 30 days before it.

After

The first 60 of 91.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021bebuzjx. Read Thu, Sep 24, 2026, 8:29 AM UTC.