M3.9 earthquake 8 km ENE of Froid, Montana
A magnitude 3.9 earthquake struck 8 km ENE of Froid, Montana on Fri, Sep 5, 1975, 2:47 PM MDT (20:47 UTC), 5 km (3 mi) below the surface.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (ml), minor
- Local time
- UTC
- 1975-09-05 20:47:40 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 48.365° N, 104.384° W
- Region
- Montana
- 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.
- Depth from
- OPERATOR_ASSIGNED
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 0 in the 60 days after this one and 0 in the 30 days before it.
None recorded.
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0000cqa. Read Tue, Sep 22, 2026, 5:28 PM UTC.