A magnitude-4.2 earthquake struck 1.3 miles north of Pacoima at 4:29 a.m. Thursday, July 30, according to the US Geological Survey.

The jolt, which appeared to last about 10 seconds, violently shook the San Fernando Valley. It struck about 5 miles deep, the USGS reported.

The quake was initially registered as magnitude-4.3 but downgraded about 10 minutes later by the USGS.

People in the San Fernando Valley, La Crescenta, Downtown Los Angeles, the Miracle Mile area, Hollywood and Pasadena reported feeling the quake.

A magnitude-3.3 aftershock hit at 4:38 a.m. That quake hit about 5.8 miles deep.

There have been at least 30 aftershocks as of 5:30 a.m., most in the 1- to 1.5-magnitude range, a geologist told Fox11.

The Los Angeles Fire Department said it immediately implemented its post-earthquake protocols, with fire department vehicles and helicopters patrolling its 470 square-mile jurisdiction to look for damages or residents experiencing emergencies. No damage or injuries were immediately reported.

“The LAFD has concluded the systematic survey of the City of Los Angeles by ground and air, and is pleased to report that no major infrastructure damage was noted by our personnel in the City of Los Angeles, and that there has been no loss of life or serious injury that we can directly attribute to the (magnitude) 4.2 earthquake,” spokesman Nicholas Prange said.

The Los Angeles and Beverly Hills police departments reported normal operations, but both strongly encouraged residents to be prepared in the event of a major earthquake.

City News Service contributed to this report.

More to come.

LA Daily News