M3.8 earthquake 92 km WNW of Nikiski, Alaska
A magnitude 3.8 earthquake struck 92 km WNW of Nikiski, Alaska on Tue, Apr 17, 1973, 8:40 PM GMT-10 (06:40 UTC), 146 km (91 mi) below the surface.
A larger quake followed: M4.9 70 km WNW of Nikiski, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.8 (mb, body-wave), minor
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1973-04-18 06:40:15 UTC
- Depth
- 146.0 km (90.7 mi), intermediate-depth
- Epicenter
- 60.945° N, 152.908° 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
- 23
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 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 usp00001em. Read Thu, Oct 1, 2026, 5:36 PM UTC.