M4.2 earthquake 64 km N of Chase, Alaska
A magnitude 4.2 earthquake struck 64 km N of Chase, Alaska on Tue, May 20, 1975, 7:29 AM GMT-9 (16:29 UTC), 125 km (78 mi) below the surface.
A larger quake followed: M4.3 11 km E of Susitna North, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.2 (mb), light
- Local time
- UTC
- 1975-05-20 16:29:50 UTC
- Depth
- 125.0 km (77.7 mi), intermediate-depth
- Epicenter
- 63.028° N, 150.003° 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 3 in the 30 days before it.
After
- 3.537 km NNE of Chase, Alaska · 18750 days ago · 61 km deep · 36 km away
- 3.17 km WNW of Trapper Creek, Alaska · 18749 days ago · 33 km deep · 79 km away
- 4.311 km E of Susitna North, Alaska · 18738 days ago · 59 km deep · 98 km away
- 4.062 km SE of Denali National Park, Alaska · 18724 days ago · 133 km deep · 48 km away
Before
Earthquakes todayAlaska earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000b3k. Read Mon, Sep 28, 2026, 5:05 PM UTC.