Alaska earthquakes

M2.5 earthquake 165 km SSE of Adak, Alaska

A magnitude 2.5 earthquake struck 165 km SSE of Adak, Alaska on Wed, Mar 10, 2021, 2:15 PM HAST (00:15 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.8 98 km SSE of Adak, Alaska. This one was a foreshock.

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The earthquake

Magnitude
2.5 (ml), micro
Local time
UTC
2021-03-11 00:15:54 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
50.421° N, 176.097° 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 4.3 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
306°, poorly surrounded by stations
Stations used
23

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 7 in the 30 days before it.

After

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000dydz (also filed as ak02137rpmpe). Read Thu, Sep 24, 2026, 12:47 PM UTC.