Alaska earthquakes

M3.0 earthquake 259 km W of Adak, Alaska

A magnitude 3.0 earthquake struck 259 km W of Adak, Alaska on Thu, Sep 10, 2020, 4:19 PM GMT+12 (04:19 UTC), 146 km (91 mi) below the surface.

A larger quake followed: M4.2 Rat Islands, Aleutian Islands, Alaska. This one was a foreshock.

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The earthquake

Magnitude: 3.0 (ml), minor
Local time: Thu, Sep 10, 2020, 4:19 PM GMT+12
UTC: 2020-09-10 04:19:55 UTC
Depth: 146.5 km (91.0 mi), intermediate-depth
Epicenter: 51.912° N, 179.592° E
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 10.1 km horizontally, 5.3 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 156°
Stations used: 30

Nearby

Within 100 km, magnitude 1.5 and up: 106 in the 60 days after this one and 69 in the 30 days before it.

After

The first 60 of 106.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000bpxe (also filed as ak020bo50201). Read Mon, Sep 28, 2026, 6:40 AM UTC.