Alaska earthquakes

M1.7 earthquake 30 km SW of Adak, Alaska

A magnitude 1.7 earthquake struck 30 km SW of Adak, Alaska on Fri, Jul 27, 2018, 12:27 PM HADT (21:27 UTC), 41 km (25 mi) below the surface.

A larger quake followed: M6.5 108 km WSW of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 1.7 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Fri, Jul 27, 2018, 12:27 PM HADT
UTC: 2018-07-27 21:27:29 UTC
Depth: 40.6 km (25.2 mi), shallow
Epicenter: 51.687° N, 176.964° 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: 20

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 84 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0189kcg522 (also filed as ak19975031). Read Thu, Oct 1, 2026, 10:21 PM UTC.