Northern California shaken by 7.0 magnitude earthquake, tsunami warning issued

The quake struck at 10:44 a.m. west of Ferndale, a small city in coastal Humboldt County near the Oregon border, according to the U.S. Geological Survey.

It was felt as far south as San Francisco, where residents felt a rolling motion for several seconds. It was followed by smaller aftershocks.

The San Francisco Bay Area Rapid Transit Area Rapid Transit Area Rapid Transit District, known as BART, has stopped traffic in all directions through the underwater tunnel between San Francisco and Oakland.