M4.0 earthquake 42 km W of Cantwell, Alaska
A magnitude 4.0 earthquake struck 42 km W of Cantwell, Alaska on Sun, Apr 13, 1975, 10:32 AM GMT-9 (19:32 UTC), 114 km (71 mi) below the surface.
A larger quake followed: M5.4 70 km WSW of Cantwell, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 1975-04-13 19:32:48 UTC
- Depth
- 114.0 km (70.8 mi), intermediate-depth
- Epicenter
- 63.401° N, 149.791° 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
- 21
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 4 in the 30 days before it.
After
- 3.753 km NNW of Petersville, Alaska · 18792 days ago · 119 km deep · 92 km away
- 3.447 km N of Chase, Alaska · 18767 days ago · 107 km deep · 60 km away
- 5.470 km WSW of Cantwell, Alaska · 18764 days ago · 106 km deep · 35 km away
- 4.264 km N of Chase, Alaska · 18762 days ago · 125 km deep · 43 km away
- 3.537 km NNE of Chase, Alaska · 18754 days ago · 61 km deep · 74 km away
Before
- 3.239 km NNE of Chase, Alaska · 18806 days ago · 31 km deep · 72 km away
- 3.563 km SE of Denali National Park, Alaska · 18820 days ago · 143 km deep · 57 km away
- 3.864 km SE of Denali National Park, Alaska · 18823 days ago · 128 km deep · 56 km away
- 3.822 km NNE of Petersville, Alaska · 18825 days ago · 122 km deep · 90 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000aky. Read Thu, Oct 1, 2026, 9:32 PM UTC.