A preliminary magnitude 5.5 earthquake shook Northern California Thursday afternoon, officials said.

According to the U.S. Geological Survey, the earthquake occurred at 4:19 p.m. PT. The quake’s center was about 2.5 miles southwest of the community of East Shore, according to the USGS. A brief jolt was felt in the San Francisco Bay Area but there are no immediate reports of damage.

“Since the quake was greater than magnitude 5, #ShakeAlert-powered alerts were delivered to cell phones,” USGS ShakeAlert said on Twitter.