Six earthquakes have rattled southern Colorado since shortly after 11:00 p.m. Thursday night, with five occurring in Las Animas County west of Trinidad, and one in San Juan County Friday morning according to the United States Geological Survey.

The first four quakes occurred between 11:06 p.m. Thursday and 3:50 a.m. Friday in Las Animas County. The first and strongest earthquake registered as magnitude 4.3 on the Richter Scale and was located about 10 miles west of Trinidad. Nearly 100 people have reported feeling the quake according to the USGS.

At 7:55 a.m., a magnitude 3.6 quake was recorded in the Rico Mountains of San Juan County about nine miles south of Silverton, or 31 miles north of Durango. That earthquake occurred at about three miles beneath the surface. At 11:00 a.m. Friday, 17 people reported feeling the quake, including several reports from around Telluride.

The most recent earthquake, which occurred at 8:30 a.m., was in the same area of Las Animas County as the early morning quakes northwest of Lake Trinidad and Trinidad State Park. It had a magnitude of 3.5 and occurred about 1.5 miles beneath the surface.

No reports of damage have been received.

Minor earthquakes are relatively common in Las Animas County. Over the past 45 days, the area around Trinidad has experienced eight earthquakes measuring 2.5 or greater on the Richter Scale, including a magnitude 3.1 which occurred January 31 just outside of Trinidad.