The US Geological Survey says the 9:33 a.m. quake had a preliminary magnitude of 4.1 and was centered near the Orange County city of Yorba Linda.
YORBA LINDA, California
Another moderate earthquake has shaken a wide area of Southern California.
The quake was initially measured at magnitude-4.5.
A magnitude 4.4 quake centered in the same area struck late Tuesday night. No damage was reported.
Yorba Linda is about 35 miles (56 kilometers) southeast of downtown Los Angeles.