M4.5 earthquake 133 km SW of Nikolski, Alaska
A magnitude 4.5 earthquake struck 133 km SW of Nikolski, Alaska on Fri, Apr 12, 1985, 5:51 PM HAST (03:51 UTC), 33 km (21 mi) below the surface.
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
- 1985-04-13 03:51:32 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.001° N, 170.094° 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
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.263 km SW of Nikolski, Alaska · 15117 days ago · 33 km deep · 70 km away
- 4.5137 km WSW of Nikolski, Alaska · 15079 days ago · 79 km deep · 49 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002drt. Read Tue, Sep 22, 2026, 8:11 AM UTC.