EADS, Colo. -- The severe weather keeps coming this summer. Now add a few earthquakes to the list.

On Sunday night, a 3.9 magnitude earthquake hit the eastern plains, just east of Eads in Kiowa County. Then on Monday night, a 3.7 magnitude earthquake hit 11 miles north of Craig in northwestern Colorado.

These quakes were small and no damage was reported, but geologists learned a fault in Kiowa County may be longer and more powerful than originally thought.

Sunday's earthquake was located near, but not on the Cheraw fault. The fault is one of the three most dangerous faults in Colorado and until Sunday, was thought to be capable of producing a magnitude 7.0 earthquake.

Vince Matthews, Director of the Colorado Geological Survey said the new quake may prove the Cheraw fault runs much farther to the east.

"If that fault does indeed extend out there, then it's possible that it could have a larger earthquake than what is thought now," Matthews said.

He said if the fault does prove to be longer, it could produce a magnitude 8.0 earthquake. He said that kind of quake would cause catastrophic damage in southeastern Colorado and would even cause significant damage in Denver.

"It is a wake up to people that we do have the potential for strong earthquakes in Colorado," Matthews said.

Matthews said it's impossible to predict when a large earthquake may occur on the fault, but the Colorado Division of Emergency Management is conducting drills to prepare for a major earthquake event.

According to the CGS, Colorado only averages about three earthquakes per year and most are below magnitude 3.5.