A good-sized earthquake was felt overnight in the Pacific Ocean off the coast of Southern California and Mexico.

The 6.3 magnitude quake was centered underneath the water 80-miles south of Catalina Island at 2:36 a.m. Friday and 167 miles west southwest of Rosarito, Mexico.

The quake was originally reported as a 6.4 magnitude shaker.

There was no injuries or damage reported, but people reported feeling it from San Diego to Los Angeles.

News Channel 3 did not receive calls from viewers here in the desert feeling it, but the U.S. Geological Survey website reported a few people in the Coachella Valley saying they felt weak shaking.

It was at the relatively shallow depth of 6.3 miles.

No tsunami warning was issued.

A 4.7 magnitude aftershock followed a short time after the main quake.

The U.S.G.S. said the main quake was not on the San Andreas fault system, but was the biggest quake in that ocean area-- in more than 40-years.