M5.8 earthquake 140 km ESE of Nikolski, Alaska
A magnitude 5.8 earthquake struck 140 km ESE of Nikolski, Alaska on Tue, Oct 19, 1971, 2:02 AM GMT-9 (11:02 UTC), 33 km (20 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.8 (mw), moderate
- Local time
- UTC
- 1971-10-19 11:02:40 UTC
- Depth
- 32.6 km (20.3 mi), shallow
- Epicenter
- 52.612° N, 166.844° 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.
- Magnitude uncertainty
- ±0.37
- Depth from
- From location
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 iscgem779432 (also filed as ushis3173). Read Tue, Sep 22, 2026, 9:14 AM UTC.