Earthquake strikes off California; tsunami warning issued

A strong earthquake was felt widely across Northern California on Thursday and authorities have issued a tsunami warning.

The quake struck at 10:44 a.m. local time, 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.

Information is still coming in.