Alaska earthquakes

M3.7 earthquake 78 km SW of Nikolski, Alaska

A magnitude 3.7 earthquake struck 78 km SW of Nikolski, Alaska on Sat, Aug 8, 2020, 12:32 PM AKDT (20:32 UTC), 44 km (28 mi) below the surface.

A larger quake followed: M5.5 129 km SSW of Nikolski, Alaska. This one was a foreshock.

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Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.7 (mb), minor
Local time
UTC
2020-08-08 20:32:26 UTC
Depth
44.3 km (27.5 mi), shallow
Epicenter
52.369° N, 169.544° 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 6.0 km horizontally, 9.1 km in depth
Magnitude uncertainty
±0.29
Depth from
From location
Station coverage gap
203°, poorly surrounded by stations
Stations used
50

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 33 in the 60 days after this one and 25 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000bb8n (also filed as ak020a5tv9yy). Read Wed, Sep 30, 2026, 7:00 PM UTC.