M4.5 earthquake 88 km SSW of Nikolski, Alaska
A magnitude 4.5 earthquake struck 88 km SSW of Nikolski, Alaska on Fri, Oct 4, 1985, 8:31 AM AKDT (16:31 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M4.9 99 km SSW 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
- 4.5 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1985-10-04 16:31:50 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.181° N, 169.263° 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
- OPERATOR_ASSIGNED
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.999 km SSW of Nikolski, Alaska · 14975 days ago · 33 km deep · 12 km away
- 4.851 km ESE of Nikolski, Alaska · 14961 days ago · 33 km deep · 98 km away
Before
- 4.877 km S of Nikolski, Alaska · 14976 days ago · 33 km deep · 43 km away
- 4.865 km S of Nikolski, Alaska · 14977 days ago · 33 km deep · 38 km away
- 4.947 km S of Nikolski, Alaska · 14978 days ago · 33 km deep · 45 km away
- 5.771 km S of Nikolski, Alaska · 14978 days ago · 33 km deep · 31 km away
- 4.777 km SSW of Nikolski, Alaska · 14979 days ago · 33 km deep · 13 km away
- 4.985 km SSW of Nikolski, Alaska · 14986 days ago · 33 km deep · 21 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002kfj. Read Sun, Oct 4, 2026, 3:32 PM UTC.