Alaska earthquakes

M1.7 earthquake 78 km WNW of Tyonek, Alaska

A magnitude 1.7 earthquake struck 78 km WNW of Tyonek, Alaska on Thu, Sep 21, 2017, 12:07 PM AKDT (20:07 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M2.5 47 km NW of Beluga, 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
1.7 (ML, local (Richter)), micro
Magnitude from
Alaska Earthquake Center
Local time
UTC
2017-09-21 20:07:28 UTC
Depth
10.1 km (6.3 mi), shallow
Epicenter
61.306° N, 152.520° 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
28

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 153 in the 60 days after this one and 72 in the 30 days before it.

After

The first 60 of 153.

Before

Earthquakes todayAlaska earthquakesLive radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event ak017c4xtuol (also filed as ak16875518). Read Sun, Oct 4, 2026, 9:58 PM UTC.