M4.2 earthquake 3 km WSW of Jansen, Colorado
A magnitude 4.2 earthquake struck 3 km WSW of Jansen, Colorado on Sat, Sep 22, 1973, 9:58 PM MDT (03:58 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
- 4.2 (mb), light
- Local time
- UTC
- 1973-09-23 03:58:54 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 37.148° N, 104.571° W
- Region
- Colorado
- 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
- 8
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 usp00003hd. Read Tue, Sep 22, 2026, 8:45 AM UTC.