Alaska earthquakes

M1.7 earthquake 48 km E of Adak, Alaska

A magnitude 1.7 earthquake struck 48 km E of Adak, Alaska on Mon, Aug 30, 2021, 8:38 AM HADT (17:38 UTC), 149 km (92 mi) below the surface.

A larger quake followed: M4.7 49 km NE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
1.7 (ml), micro
Local time
UTC
2021-08-30 17:38:21 UTC
Depth
148.6 km (92.3 mi), intermediate-depth
Epicenter
51.825° N, 175.932° 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
24

Nearby

Within 100 km, magnitude 1.5 and up: 112 in the 60 days after this one and 87 in the 30 days before it.

After

The first 60 of 112.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak021b4iejp1. Read Sat, Sep 26, 2026, 11:39 PM UTC.