M4.9 earthquake 85 km SSW of Nikolski, Alaska
A magnitude 4.9 earthquake struck 85 km SSW of Nikolski, Alaska on Sun, Sep 22, 1985, 9:37 PM AKDT (05:37 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.7 71 km S 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
- 4.9 (mb), light
- Local time
- UTC
- 1985-09-23 05:37:21 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 52.284° N, 169.518° 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 1.9 and up: 8 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.777 km SSW of Nikolski, Alaska · 14967 days ago · 33 km deep · 15 km away
- 5.771 km S of Nikolski, Alaska · 14966 days ago · 33 km deep · 45 km away
- 4.947 km S of Nikolski, Alaska · 14966 days ago · 33 km deep · 50 km away
- 4.865 km S of Nikolski, Alaska · 14965 days ago · 33 km deep · 50 km away
- 4.877 km S of Nikolski, Alaska · 14963 days ago · 33 km deep · 60 km away
- 4.588 km SSW of Nikolski, Alaska · 14963 days ago · 33 km deep · 21 km away
- 4.999 km SSW of Nikolski, Alaska · 14963 days ago · 33 km deep · 23 km away
- 4.7118 km WSW of Nikolski, Alaska · 14923 days ago · 33 km deep · 83 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002k13. Read Tue, Sep 22, 2026, 5:40 AM UTC.