M4.7 earthquake 79 km SSW of Nikolski, Alaska
A magnitude 4.7 earthquake struck 79 km SSW of Nikolski, Alaska on Thu, Dec 20, 1973, 11:44 PM GMT-10 (09:44 UTC), 47 km (29 mi) below the surface.
A larger quake followed: M4.8 84 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
- 4.7 (mb), light
- Local time
- UTC
- 1973-12-21 09:44:25 UTC
- Depth
- 47.0 km (29.2 mi), shallow
- Epicenter
- 52.296° N, 169.379° 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.
- Stations used
- 27
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 10 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.884 km SSW of Nikolski, Alaska · 19268 days ago · 44 km deep · 6 km away
- 4.782 km SSW of Nikolski, Alaska · 19268 days ago · 49 km deep · 5 km away
- 4.765 km SW of Nikolski, Alaska · 19268 days ago · 49 km deep · 23 km away
- 4.644 km WNW of Nikolski, Alaska · 19268 days ago · 33 km deep · 95 km away
- 4.474 km SSW of Nikolski, Alaska · 19268 days ago · 49 km deep · 5 km away
- 4.3107 km S of Nikolski, Alaska · 19268 days ago · 36 km deep · 38 km away
- 4.075 km SSW of Nikolski, Alaska · 19263 days ago · 59 km deep · 10 km away
- 4.262 km ESE of Nikolski, Alaska · 19234 days ago · 33 km deep · 98 km away
- 5.665 km S of Nikolski, Alaska · 19227 days ago · 36 km deep · 44 km away
- 4.877 km S of Nikolski, Alaska · 19227 days ago · 44 km deep · 41 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00004kr. Read Tue, Sep 22, 2026, 10:27 AM UTC.