M4.5 earthquake 137 km WSW of Nikolski, Alaska
A magnitude 4.5 earthquake struck 137 km WSW of Nikolski, Alaska on Sun, Jun 9, 1985, 1:34 PM HADT (22:34 UTC), 79 km (49 mi) below the surface.
A larger quake followed: M4.6 Fox Islands, Aleutian Islands, 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), light
- Local time
- UTC
- 1985-06-09 22:34:57 UTC
- Depth
- 78.8 km (49.0 mi), intermediate-depth
- Epicenter
- 52.311° N, 170.609° 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
- FROM_LOCATION
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002fpy. Read Tue, Sep 22, 2026, 2:47 PM UTC.