A short earthquake registering magnitude-4.0 rattled the San Francisco Bay Area on Monday, The Associated Press reported.
The temblor, which struck at 6:49 a.m. PT, broke picture frames and cracked plaster, but there were no immediate reports of injuries or damage.
The U.S. Geological Survey said the quake hit just north of Piedmont, near Berkeley. However, it was also felt as far away as downtown San Francisco.
"This was a fairly small one, but we should be prepared for them at all times," USGS spokeswoman Leslie Gordon told the AP.
The shallow quake produced a sharp jolt followed by gentle rolls, the wire service said. People on social media reported broken clocks and picture frames.
"I was eating breakfast when the whole house shook and several picture frames propped on our mantle and on a side table in the dining room crashed to the floor," Adam Van de Water of Oakland said in an email to The Associated Press. "My heart rate spiked and stayed elevated for a few minutes until it was clear it was over."
Bay Area Rapid Transit held commuter trains for about five minutes as crews checked the tracks. No damage was reported.
Monday's quake came just one week before the one-year anniversary of the magnitude-6.0 earthquake that caused millions of dollars in damage and injured hundreds of people in California wine country.