Alaska earthquakes

M5.6 earthquake 87 km SSW of False Pass, Alaska

A magnitude 5.6 earthquake struck 87 km SSW of False Pass, Alaska on Tue, Dec 27, 1983, 2:05 PM AKST (23:05 UTC), 53 km (33 mi) below the surface.

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The earthquake

Magnitude
5.6 (mb), moderate
Local time
UTC
1983-12-27 23:05:57 UTC
Depth
52.8 km (32.8 mi), shallow
Epicenter
54.191° N, 164.140° 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.

Depth from
CONSTRAINED_BY_DEPTH_PHASES

Nearest places

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

Nearby

Within 100 km, magnitude 2.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.

None recorded.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp00020v3 (also filed as gcmtb122783c, ushis3835, gcmt19831227230557, iscgem563766). Read Tue, Sep 22, 2026, 3:48 PM UTC.