SOUTHERN California has been rocked by a 4.2 magnitude earthquake that shook buildings.
The quake hit near the Palomar Observatory, which is located roughly 65 miles from downtown San Diego.
“Heard a rumble before I felt the shutter,” wrote one person.
Another person described the quake as coming “in two jolts.”
“I was standing in the doorway talking to my sweetie when the whole-home alarm clock buzzer went off for a few seconds, then bang,” wrote another person.
“We felt it in Escondido, just as our earthquake alert went cuckoo!!” an Escondido resident told ABC 10.
“The dogs were freaked out- they ran around barking at it.”
The US Geological Survey initially said the quake was an estimated 4.5.
So far, there are no reports of serious damage or injuries.
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An estimated 20.3million people could have felt weak to light shaking, said the USGS.
The National Weather Service in San Diego confirmed the quake, adding that two jolts were felt at the office.
“No tsunami expected,” they tweeted.