An earthquake with a preliminary magnitude of 3.3 shook eastern San Diego County, and was felt as far away as Riverside Sunday morning.
"We feel them out here all the time, but not like this one," said Cheryl Gillott, a state parks worker in Ocotillo Wells. "It was pretty big."
The 9:04 a.m. temblor was centered about 16 miles east-southeast of Julian, or 16 miles due south of Borrego Springs. That spot would be in the isolated desert mountains about 75 miles southeast of downtown Riverside.
Persons scattered around eastern San Diego County reported feeling shaking from the quake, which was centered at a depth of about 3 miles below the surface. It was also reportedly felt in the cities of San Diego and Riverside.
Gillott, an employee at the Ocotillo Wells State Vehicular Recreation Area Discovery Center, described the quake as having a rolling, as opposed to jolting, motion.
Automated seismographs and computers originally calculated the quake to be magnitude 3.3, but the data was reviewed by seismologists and the magnitude was changed to 3.4.