Originally published at 9:32 a.m. March 29, 2014. Edited with new details.
Firefighters today red-tagged 20 units in a large apartment complex and six homes in Fullerton neighborhoods that appeared to have suffered the most substantial property damage resulting from Friday's magnitude 5.1 earthquake.
The temblor, which was centered one mile east of La Habra, also caused minor damage to gas and water main breaks, a rockslide in Brea and some street flooding in northern Orange County, but no injuries were reported.
In Fullerton, the fire department began a concerted effort at about 8:30 a.m. to assess the structural integrity of many of the city's buildings, said Battalion Chief John Stokes. Inspections were expected to be concluded by noon.
The apartment complex where units were red-tagged was in the 2700 block of Associated Road in northeast Fullerton while the individual homes were in northwest Fullerton, Stokes said.
"We've got gas meters broken and five water mains ruptured," he said.
Authorities were also inspecting apartment buildings in La Habra, where as many as 50 residents spent time during Friday night at a Red Cross shelter in the community center after self-evacuating from their homes. The shelter closed this morning.
The quake struck at 9:09 p.m. Friday at a depth of five miles, and was preceded by a magnitude 3.6 quake in the area at 8:03 p.m., according to the U.S. Geological Survey.
The earthquake was felt from the Mexico border to the Central Valley in at least seven Southern California counties, including Los Angeles, Orange, Riverside, San Bernardino, San Diego, Ventura and Kern.
More than 100 aftershocks have shaken Orange County since the magnitude 5.1 quake struck, according to the U.S. Geological Survey.
The shaker was estimated to be about 10 times larger than the March 17 magnitude 4.4 quake near Encino in terms of energy released, said Lucy Jones, a visiting research associate at Caltech's Seismological Laboratory.
The March temblor struck early on a Monday morning. This one, 12 days later, was a reminder to the community, to be prepared, Mayor Eric Garcetti said.
"L.A. residents can visit readyla.org for guidance on how to best prepare for the next earthquake, including potential aftershocks," Garcetti said.
In Brea, the quake caused a rock slide which overturned a car and blocked Carbon Canyon Road, according to authorities.
Southern California Edison reported that 1,748 customers in the La Mirada area lost power. Edison spokeswoman Susan Cox said the outage, which occurred at 9:11 p.m., was most likely related to the earthquake.
The Los Angeles County Fire Department received reports of gas leaks in the Rowland Heights area and scattered minor damage, said department supervisor Ed Pickett.
The Los Angeles police and fire departments conducted an assessment and reported no damage in the city, Garcetti said.
Disneyland shut down rides as a precaution, NBC4 reported.
Train services were also affected, with Metrolink announcing that its service from San Bernardino to Union Station was running 150 minutes behind schedule, and its Orange County line 644 to Oceanside 42 minutes late. Those delays were a result of precautionary slowing due to the earthquake, Metrolink said on its website. However, No damage to the Metro Rail system was found following a check of all lines, the agency's Paul Gonzales told City News Service.
The fault that caused the earthquake was close to, but separate from the Puente Hills thrust (fault) that was responsible for the 1987 Whittier Narrows earthquake, said Caltech's Jones.
"There is no definitive information on the fault," Jones said. "There are several active faults in that region that have been mapped."
Jones said her preliminary research indicated the fault was last active on July 8, 1929.
A lieutenant at the San Diego County Sheriff's Department said residents reported feeling the earthquake in the North County and as far south as Mission Valley.
--City News Service