M4.3 earthquake 7 km SE of Brighton, Colorado
A magnitude 4.3 earthquake struck 7 km SE of Brighton, Colorado on Mon, Apr 10, 1967, 12:00 PM GMT-7 (19:00 UTC), 5 km (3 mi) below the surface.
A larger quake followed: M4.5 9 km SSE of Brighton, Colorado. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (Lg), light
- Magnitude from
- USGS historic United States catalog
- Local time
- UTC
- 1967-04-10 19:00:25 UTC
- Depth
- 5.0 km (3.1 mi), shallow
- Epicenter
- 39.940° N, 104.750° W
- Region
- Colorado
- Strongest shaking
- VI, strong shaking
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
What happened
The USGS’s account of the effects of this earthquake.
Maximum observed Modified Mercalli Intensity (MMI) VI
From the USGS event page for ushis2949. U.S. Geological Survey text and figures are in the public domain.
Shaking
The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.
- Strongest estimated
- VI, strong shaking
- Map
- Automatic
Did you feel it?
No one has reported feeling this quake to the USGS.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayColorado earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event ushis2949 (also filed as atlas19670410190025). Read Fri, Oct 2, 2026, 2:46 PM UTC.