EUREKA, Calif., Dec. 8 (UPI) — A 6.5-magnitude earthquake rocked Northern California coast on Thursday morning, the U.S. Geological Survey said.

The quake was centered 102 miles west of Ferndale, about 20 miles from Eureka. It struck around 6:50 a.m. at a depth of about 6.2 miles, according to the United States Geological Survey. It was felt as far south as San Francisco — 270 miles from Eureka. It was initially reported as a 6.8 magnitude quake.

No tsunami warning was issued and no injuries were reported.

“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,” said Pam Cahill, a retired teacher who lives 3 miles north of Eureka, told SFGate.com.

Bay Area Rapid Transit ordered all trains to slow down as workers checked for any damage to tracks and equipment, said a dispatcher.

Two quakes shook the region earlier this week — one on Monday (4.4) and one on Tuesday (4.3), SFGate.com reported. The first one was 117 miles northwest of Eureka and the second one was 37 miles southwest of Eureka.

On Wednesday, a magnitude-6.5 earthquake in Indonesia killed at least 102 people.