Alaska earthquakes

M1.6 earthquake 44 km ESE of Adak, Alaska

A magnitude 1.6 earthquake struck 44 km ESE of Adak, Alaska on Sun, Jun 27, 2021, 11:31 PM HADT (08:31 UTC), 68 km (42 mi) below the surface.

A larger quake followed: M5.0 49 km ESE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.6 (ml), micro
Local time
UTC
2021-06-28 08:31:18 UTC
Depth
68.0 km (42.3 mi), shallow
Epicenter
51.775° N, 176.008° 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
18

Nearby

Within 100 km, magnitude 1.5 and up: at least 199 in the 60 days after this one and 15 in the 30 days before it.

After

The first 60 of at least 199.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak02188659w7. Read Sun, Sep 27, 2026, 4:57 AM UTC.