Alaska earthquakes

M1.5 earthquake 30 km WSW of Nanwalek, Alaska

A magnitude 1.5 earthquake struck 30 km WSW of Nanwalek, Alaska on Fri, Oct 20, 2017, 8:59 PM AKDT (04:59 UTC), 70 km (43 mi) below the surface.

A larger quake followed: M3.9 Southern Alaska. This one was a foreshock.

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

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The earthquake

Magnitude: 1.5 (ML, local (Richter)), micro
Magnitude from: Alaska Earthquake Center
Local time: Fri, Oct 20, 2017, 8:59 PM AKDT
UTC: 2017-10-21 04:59:16 UTC
Depth: 69.9 km (43.4 mi), shallow
Epicenter: 59.209° N, 152.376° 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.

Stations used: 23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 166 in the 30 days before it.

After

The first 60 of at least 200.

Before

Earthquakes today Alaska earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017diaqg4e (also filed as ak17097353). Read Sun, Oct 4, 2026, 11:27 AM UTC.