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.

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The earthquake

Magnitude
4.3 (mb), light
Local time
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 todayAlaska earthquakesLive 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.