A federal agency says a minor earthquake in Colorado and Utah might have been caused by a high-pressure well that injects brine 16,000 feet into the Earth.
A small earthquake was felt in southwestern Colorado and southeastern Utah.
A weak earthquake has hit the Colorado mountains.
A delegation from one of the areas hardest hit by last year’s earthquake and tsunami in Japan is in Denver on a thank-you mission.
An earthquake shook Southern Colorado Thursday night.
Emergency planners say most Coloradans are unprepared for an earthquake even though officials have spent years studying the consequences of a big one.
A Coloradan working in Maryland felt the shaking of the earthquake that originated in Virginia as he was on the phone with his girlfriend in Denver.
A series of earthquakes were recorded in southern Colorado on Monday.
The earthquake that struck Virginia on Tuesday hit an area that historically is not seismically active — and there’s no connection with another rare quake that struck Colorado.
Two small earthquakes have hit southern Colorado near the New Mexico border, but no damage has been reported.