Largest Quake Since 1973 Rocks Colorado

The strongest earthquake to hit Colorado in nearly 40 years has shaken homes near the New Mexico border and caused rockslides along highways—but there have been no immediate reports of injuries. The 5.3-magnitude quake struck close to midnight, centered some 180 miles south of Denver, AP reports. Two milder quakes were felt earlier in the day in the area, which recorded a series of a dozen earthquakes a decade ago. "The area seems to be active again," says a US Geological Service geophysicist. (More US Geological Survey stories.)