Was that an earthquake you just felt or merely a big truck rumbling by? You don't have to wonder thanks to the U.S.

Colorado has the potential for much larger earthquakes than a 2.9 quake in Dacono on June 13. Here's what to know and when the last earthquake was.

Seismologist William Yeck explained that Colorado is not an epicenter for major earthquakes, nor is it immune to them. And sometimes they are triggered by human activity.

Two earthquakes took place in southern Colorado on Monday morning, just five minutes apart. The first quake occurred near the small town of El Moro at about 8:13 a.m., reaching a 3.8 magnitude.

Colorado earthquake: A magnitude 5.3 earthquake shook the state late Monday, with an epicenter about 180 miles south of Denver, Colorado.

One of the largest earthquakes to hit Colorado in decades rattled homes and businesses near Trinidad on the night of March 9, one of a series of six small quakes that were detected in western Las ...

PRITCHETT, Colo. — Seismologists are calling an earthquake in southeast Colorado on Monday morning a mystery. The magnitude 3.8 earthquake was detected at 3:27 a.m. about five miles northwest of ...

SEGUNDA, Colo. (CBS4) - A series of earthquakes were recorded in southern Colorado on Monday and Tuesday. The last one was the strongest to hit the state in nearly 40 years. That one, a 5.3 ...

GOLDEN, Colo. — A magnitude 4.1 earthquake about 27 miles northwest of Parachute was one of four earthquakes felt by Coloradans Friday morning within a five-hour span. The shaking started at 12: ...

An earthquake shook Wendy Rubin awake in Morocco on the night of Sept. 8. She had never experienced a quake and this one seemed – in Casablanca, where she lives – pretty mild.

On Thursday, Colorado will take part in the annual "Great ShakeOut" earthquake drills. The global event is aimed at teaching people how to survive and recover from a large-scale earthquake.

The strongest earthquake to hit Colorado in more than four decades startled thousands of residents along the New Mexico border as it toppled chimneys, cracked walls and triggered minor rockslides ...