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.
Since I can’t fall asleep again anyway, here is a seismicity map of the area around the M4.2 strike-slip earthquake near Pacoima. The Northridge sequence is to the West, The San Fernando sequence is prior to the start of the catalog, but closer to today’s hypocenter. pic.twitter.com/FFEQ8pMCvt
— Jascha Polet (@CPPGeophysics) July 30, 2020
— EMSC (@LastQuake) July 30, 2020
Earthquake LIVE on the air on @ABC7 this morning! You can see the lights sway from the 4.2 temblor that hit near Pacoima area. We are in the middle of LIVE coverage now. https://t.co/VNOVM5XxQB #earthquakes #pacoima #quake #goodmorning #jolt pic.twitter.com/8VqH7DDyJv
— Brandi Hitt (@ABC7Brandi) July 30, 2020
— FOX 11 Los Angeles (@FOXLA) July 30, 2020
UPDATE: Just spoke to seismologist at @USGS HQ.
This is the latest official info on San Fernando Valley #earthquake:
-Depth: 7.9km/4.9 miles
-As of 5:30am there have been 30+ aftershocks to main #quake – most in the 1 – 1.5 magnitude @foxla pic.twitter.com/SiljdyTK3J
— Gigi Graciette (@GigiGraciette) July 30, 2020
#earthquake preliminary mag 4.2 near San Fernando. In Santa Monica near the coast sensation was slow then a fast rattle shaking whole house with pictures on walls shaking. No damage in home. No damage flights running from LAPD Air Support due to low cloud ceiling.@KNX1070
— Pete Demetriou (@knxpete) July 30, 2020
City News Service contributed to this report.
More to come.