Alaska earthquakes

M2.5 earthquake 48 km ENE of Adak, Alaska

A magnitude 2.5 earthquake struck 48 km ENE of Adak, Alaska on Thu, Sep 24, 2020, 7:39 AM HADT (16:39 UTC), 162 km (101 mi) below the surface.

A larger quake followed: M5.3 76 km SW of Atka, Alaska. This one was a foreshock.

Map

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

Open the live map with earthquakes

The earthquake

Magnitude: 2.5 (ml), micro
Local time: Thu, Sep 24, 2020, 7:39 AM HADT
UTC: 2020-09-24 16:39:29 UTC
Depth: 162.4 km (100.9 mi), intermediate-depth
Epicenter: 51.974° N, 175.947° 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.

Location uncertainty: About 17.1 km horizontally, 4.9 km in depth
Magnitude uncertainty: ±0.12
Depth from: From location
Station coverage gap: 171°
Stations used: 32

Nearby

Within 100 km, magnitude 1.5 and up: 124 in the 60 days after this one and 79 in the 30 days before it.

After

The first 60 of 124.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000c5uw (also filed as ak020cbhsda3). Read Mon, Sep 28, 2026, 4:56 PM UTC.