Alaska earthquakes

M3.8 earthquake 165 km W of Adak, Alaska

A magnitude 3.8 earthquake struck 165 km W of Adak, Alaska on Mon, Sep 3, 2018, 5:36 AM HADT (14:36 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M4.8 206 km WNW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.8 (ML, local (Richter)), minor
Magnitude from
Alaska Earthquake Center
Local time
UTC
2018-09-03 14:36:39 UTC
Depth
11.3 km (7.0 mi), shallow
Epicenter
51.777° N, 179.024° 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: at least 201 in the 60 days after this one and 192 in the 30 days before it.

After

The first 60 of at least 201.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak018bb2r8qy. Read Sat, Oct 3, 2026, 9:13 AM UTC.