SAN FRANCISCO—A magnitude 6 earthquake jolted both sides of the California-Nevada border, tossed boulders onto a major roadway, and was felt as far off as Las Vegas and even San Francisco, with days of aftershocks predicted, authorities said. The quake shortly before 4 p.m. Thursday was centered south of Lake Tahoe near Walker, a rural…

SAN FRANCISCO—Aftershocks have hit the region between Northern California and Nevada Friday after a magnitude 6 earthquake sent large boulders rolling into highways and knocked smaller items off shelves. The quake shortly before 4 p.m. Thursday was centered south of Lake Tahoe near Walker, a rural community of a few hundred households in the eastern…