A pair of large earthquakes hit Southern California on Friday night, the second major temblor in less than two days and one that rocked buildings across Southern California, adding more jitters to an already nervous region. The quake was centered near Ridgecrest, the location of the July Fourth 6.4 magnitude temblor that was the largest in 20yrs. More than 1,000 aftershocks have rocked the community since the 6.4 magnitude quake hit.