A pair of earthquakes, the first moderate and the second small, just one minute apart, rattled the communities of the Morongo Basin yesterday. According to the USGS, the first 3.9 magnitude temblor struck at 10:54 this morning, the second, a 2.6, hit at 10:55. The twin quakes were felt as a sharp jolt followed by a rolling motion at the Z107.7 studios in Joshua Tree. They were centered 2 miles and 3 miles respectively south-southeast of Yucca Valley. There were no reports of damages or injury.