Alaska earthquakes

M3.7 earthquake 20 km SE of False Pass, Alaska

A magnitude 3.7 earthquake struck 20 km SE of False Pass, Alaska on Mon, Oct 15, 2018, 8:36 AM AKDT (16:36 UTC), 112 km (70 mi) below the surface.

A larger quake followed: M4.5 84 km S of False Pass, 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
2018-10-15 16:36:07 UTC
Depth
112.0 km (69.6 mi), intermediate-depth
Epicenter
54.717° N, 163.193° 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 7.3 km horizontally, 2.7 km in depth
Magnitude uncertainty
±0.23
Depth from
From location
Station coverage gap
162°
Stations used
78

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 34 in the 60 days after this one and 30 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000hekp (also filed as ak018d8kim8z, ak20283896). Read Wed, Sep 30, 2026, 7:52 AM UTC.