USGS map of the earthquake's epicenter.
An earthquake of magnitude 6.5 was reported 102 miles west of Ferndale off Northern California on Thursday, the U.S. Geological Survey announced.
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People as far away as San Francisco reported feeling the quake, but there were no immediate reports of damage. Officials did not issue a tsunami warning.
“It started rolling and I could feel it. I had time to jump out of bed and crouch down and call the dog before it stopped. So it was a long rolling one,” Pam Cahill told the San Francisco Chronicle from just north of Eureka.
The USGS first reported the earthquake at 6:50 a.m. local time.
Ferndale is about 120 miles south of the Oregon border.
Two quakes with magnitudes topping 4.0 shook the region earlier this week -- one on Monday and one on Tuesday.
On Wednesday, a magnitude-6.5 earthquake in Indonesia killed more than 100 people.
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