Northern California has been rocked by two strong earthquakes.
The U.S. Geological Survey reported that the first tremor, with a magnitude of 6.6, hit just under 40 miles to the west-northwest of Petrolia.
The second was a 7.0 that struck west-southwest of Ferndale.
One social media user reported feeling the quake “pretty strongly” in Oakland, and another shared a video of the water in their swimming pool shaking.
A tsunami warning was issued by the National Weather Service for parts of the California and Oregon coasts.
Several people said they had received related alerts on their phones.
This is a breaking news story. Please check back for updates.