LOS ANGELES - A moderate earthquake rocked the Los Angeles region late Sunday but there were no immediate reports of any major injuries or damage.

The magnitude-4.7 quake hit at 8:39 p.m. local time, about 16 kilometres southwest of downtown Los Angeles, near Inglewood, Calif., said a preliminary report by the U.S. Geological Survey. The quake was followed minutes later by at least three smaller aftershocks, with the largest registering at magnitude-3.1.

The quake jiggled the greater Los Angeles region for about 10 to 15 seconds and was felt as far south as San Diego, said USGS seismologist Susan Hough.

"This was a serious jolt. It was probably felt within 100 miles," Hough said.

The shaking was most intense in the coastal communities south of the Los Angeles International Airport. Some residents said books and other items were knocked off the shelves. However, people who live north of downtown Los Angeles either felt a light shake or nothing at all.

There were no reports of any damage at LAX, just a few kilometres from the epicentre. The Los Angeles Fire Department received plenty of calls but none to report any major injuries, said spokesman Brian Humphrey.

Tom Oswalt, 46, said he was packing clothes for a business trip at his home in Long Beach when the shaking started.

"First thing I thought was: `Is this the big one?' It was pretty powerful," he said.

"My first thought was to get out of the building, get my dog and get out of the building. Now we're just waiting for aftershocks."

Hough said there will likely be more aftershocks in the "threes, maybe a four" but only a five-per-cent chance of a larger quake.

"People should be on their toes," she said.

Seismologists had pegged the quake initially at a magnitude-4.7, then revised it to a magnitude-5.0, but updated it about an hour after it struck back to 4.7.

It's the largest quake in the greater Los Angeles area since a magnitude-5.4 quake struck Chino Hills on July 29, 2008.