LA HABRA (CNS) - A magnitude-5.1 earthquake struck at 9:09 p.m. tonight, centered one mile east of La Habra, the U.S. Geological Survey reported, causing some water main breaks in Fullerton, but little significant damage.
The earthquake was felt in at least seven Southern California counties -- Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego and Ventura.
The quake was at a depth of around one mile and followed by about 20 aftershocks, two greater than magnitude 3.0, Caltech seismologist Robert Graves. There were no reports of surface rupture and scientists are not yet able to assign it to a particular fault, Graves said.
The earthquake was probably 10 times larger than the March 17 magnitude- 4.4 quake near Encino in terms of energy released, says Caltech's Lucy Jones.
Minor damage is expected from earthquakes the size of tonight's magnitude-5.1, which struck about five miles to the northwest of the magnitude- 5.4 Chino Hills earthquake of 2008, Graves said.
A magnitude-3.6 prequake struck at 8:03 p.m., according to the U.S. Geological Survey.
The Los Angeles County Fire Department received reports of gas leaks in the Rowland Heights and scattered minor damage, said department supervisor Ed Pickett.
There were several water main breaks in Fullerton, said Sgt. Jeff Stuart of the Fullerton Police Department.
The Los Angeles police and fire departments conducted an assessment and report no damage in the city, Mayor Eric Garcetti said.
Disneyland shut down rides as a precaution.
The Los Angeles Fire Department did not receive any immediate reports of damage following an initial assessment by firefighters from its 106 stations, the department's Erik Scott said.
The Los Angeles Police Department and Los Angeles and Orange county sheriff's departments did not immediately receive reports of damage or injuries.
A lieutenant at the OrangeCounty sheriff's office in SilveradoCanyon said the shaking lasted nearly 30 seconds.
The earthquake set off car alarms in Anaheim Hills, a resident said.
A lieutenant at the San Diego County Sheriff's Department said residents reported feeling the magnitude 5.3 quake -- which struck at 9:09 p.m. near La Habra in Orange County -- in the North County and as far south as Mission Valley.
No damage to the Metro Rail system was found following a check of all lines, the agency's Paul Gonzales told City News Service.
Hannah Hirzel, 17, said she was home in her room in Placentia, four miles from the epicenter, when she felt a jolt. It was the second earthquake she had felt that night, but this one felt different. It was longer and more intense, she said.
“I was home alone and I ran out of the house,” Hirzel told City News Service. “I was sitting where my bookshelf fell, but I ran too quick.”
Her bookshelf and other furniture toppled over onto where she had been moments before. Food also fell out of the pantry, with items breaking on the kitchen floor, and there are cracks in the walls, she said.
Hirzel said she was not hurt, but plans to change the design of her room to make it safer, especially by making the bookshelf more secure.
“My mom says we are going to hook it to the wall and I think I'm going to sleep downstairs tonight,” Hirzel said.
Garcetti said the earthquake “reminds us to be prepared.”
“L.A. residents can visit readyla.org for guidance on how to best prepare for the next earthquake, including potential aftershocks,” Garcetti said.