Alaska earthquakes

M4.3 earthquake 211 km W of Adak, Alaska

A magnitude 4.3 earthquake struck 211 km W of Adak, Alaska on Mon, May 11, 2020, 1:53 PM HADT (22:53 UTC), 96 km (59 mi) below the surface.

A larger quake followed: M5.2 186 km WSW 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: 4.3 (mb), light
Local time: Mon, May 11, 2020, 1:53 PM HADT
UTC: 2020-05-11 22:53:27 UTC
Depth: 95.6 km (59.4 mi), intermediate-depth
Epicenter: 51.738° N, 179.693° 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 6.6 km horizontally, 4.7 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 57°
Stations used: 114

Nearby

Within 100 km, magnitude 1.5 and up: 120 in the 60 days after this one and 55 in the 30 days before it.

After

The first 60 of 120.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us70009ee1 (also filed as ak02062ocrkl). Read Tue, Sep 29, 2026, 9:53 PM UTC.