An earthquake of 6.0 magnitude shook the San Francisco Bay Area early on Sunday, waking residents but not causing major damage, according to initial reports.

The U.S. Geological Survey said the quake's epicenter was eight km (five miles) northwest of the town of American Canyon, on the northern edge of San Francisco Bay.

Police dispatchers in San Francisco and Oakland said there were no reports of reports of major damage. Several people on Twitter also noted the quake but did not report damage. – Reuters