Alaska earthquakes

M2.3 earthquake 78 km NNE of Adak, Alaska

A magnitude 2.3 earthquake struck 78 km NNE of Adak, Alaska on Tue, Jul 17, 2018, 1:06 AM HADT (10:06 UTC), 197 km (122 mi) below the surface.

A larger quake followed: M3.9 58 km NNW of Atka, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 2.3 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Tue, Jul 17, 2018, 1:06 AM HADT
UTC: 2018-07-17 10:06:43 UTC
Depth: 196.5 km (122.1 mi), intermediate-depth
Epicenter: 52.482° N, 176.061° 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: 14

Nearby

Within 100 km, magnitude 1.5 and up: 51 in the 60 days after this one and 18 in the 30 days before it.

After

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak01893mefgo (also filed as ak19921538). Read Fri, Oct 2, 2026, 11:51 AM UTC.