Alaska earthquakes

M1.7 earthquake 82 km W of Adak, Alaska

A magnitude 1.7 earthquake struck 82 km W of Adak, Alaska on Thu, Jul 30, 2020, 4:56 PM HADT (01:56 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.6 125 km W of Adak, Alaska. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 1.7 (ml), micro
Local time: Thu, Jul 30, 2020, 4:56 PM HADT
UTC: 2020-07-31 01:56:04 UTC
Depth: 9.8 km (6.1 mi), shallow
Epicenter: 51.831° N, 177.823° 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: 38

Nearby

Within 100 km, magnitude 1.5 and up: 185 in the 60 days after this one and 92 in the 30 days before it.

After

The first 60 of 185.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak0209saedap (also filed as av91105306). Read Wed, Sep 30, 2026, 10:59 PM UTC.