Alaska earthquakes

M3.3 earthquake 153 km SSW of Nikolski, Alaska

A magnitude 3.3 earthquake struck 153 km SSW of Nikolski, Alaska on Wed, Jun 9, 2021, 9:14 PM AKDT (05:14 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.9 72 km S of Nikolski, Alaska. This one was a foreshock.

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The earthquake

Magnitude
3.3 (ml), minor
Local time
UTC
2021-06-10 05:14:49 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
51.604° N, 169.434° 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 7.5 km horizontally, 2.0 km in depth
Magnitude uncertainty
±0.10
Depth from
Operator assigned
Station coverage gap
218°, poorly surrounded by stations
Stations used
20

Nearby

Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 6 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ebtm. Read Thu, Sep 24, 2026, 3:32 AM UTC.