Alaska earthquakes

M3.5 earthquake 130 km WSW of Nikolski, Alaska

A magnitude 3.5 earthquake struck 130 km WSW of Nikolski, Alaska on Sat, Sep 26, 2020, 10:24 PM HADT (07:24 UTC), 49 km (31 mi) below the surface.

A larger quake followed: M5.2 120 km SSW of Nikolski, Alaska. This one was a foreshock.

More in Alaska

Map

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

Open the live map with earthquakes

The earthquake

Magnitude
3.5 (ml), minor
Local time
UTC
2020-09-27 07:24:57 UTC
Depth
49.4 km (30.7 mi), shallow
Epicenter
52.422° N, 170.591° 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 9.2 km horizontally, 9.9 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
175°
Stations used
44

Nearby

Within 100 km, magnitude 1.5 and up: 29 in the 60 days after this one and 17 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 us6000c40a (also filed as ak020cgaycqn). Read Tue, Sep 29, 2026, 3:01 PM UTC.