M3.7 earthquake 50 km WNW of Ninilchik, Alaska
A magnitude 3.7 earthquake struck 50 km WNW of Ninilchik, Alaska on Sun, May 18, 1975, 9:53 AM GMT-9 (18:53 UTC), 129 km (80 mi) below the surface.
A larger quake followed: M4.2 20 km E of Pedro Bay, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.7 (mb), minor
- Local time
- UTC
- 1975-05-18 18:53:25 UTC
- Depth
- 129.0 km (80.2 mi), intermediate-depth
- Epicenter
- 60.142° N, 152.550° 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
- 14
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 1 in the 30 days before it.
After
- 3.440 km W of Cohoe, Alaska · 18752 days ago · 92 km deep · 43 km away
- 4.220 km E of Pedro Bay, Alaska · 18741 days ago · 141 km deep · 77 km away
- 3.526 km W of Nikiski, Alaska · 18725 days ago · 115 km deep · 77 km away
- 3.822 km W of Happy Valley, Alaska · 18725 days ago · 96 km deep · 30 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000b2r. Read Tue, Sep 22, 2026, 4:15 PM UTC.