M5.6 earthquake 69 km S of Nikolski, Alaska
A magnitude 5.6 earthquake struck 69 km S of Nikolski, Alaska on Thu, Oct 23, 1969, 3:46 PM GMT-9 (00:46 UTC), 27 km (17 mi) below the surface.
A larger quake followed: M5.8 35 km E of Nikolski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 5.6 (Mw, moment), moderate
- Magnitude from
- ISC-GEM global catalog
- Local time
- UTC
- 1969-10-24 00:46:14 UTC
- Depth
- 27.1 km (16.8 mi), shallow
- Epicenter
- 52.324° N, 168.696° 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
- ±0.55
- Depth from
- From location
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 2.6 and up: 1 in the 60 days after this one and 1 in the 30 days before it.
After
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event iscgem803704. Read Sat, Oct 3, 2026, 5:41 AM UTC.