A 4.5-magnitude earthquake has struck in Los Angeles County, less than 24 hours after a 5.1-magnitude temblor hit the La Habra area in Orange County Friday night.
The 4.5 quake shook up the Rowland Heights area around 2:30 p.m. Saturday, according to The U.S. Geological Survey (USGS).
Residents in the area were already on edge after the 5.1 quake hit Southern California just after 9 p.m., sending rumbles as far away as San Diego County.
That temblor was centered about one mile east of La Habra. More than 30 aftershocks were reported throughout the night, according to NBC 4.
In San Diego, residents across the county felt the shaking. The NBC 7 newsroom was flooded with phone calls from residents reporting they had felt the earthquake in places like Ramona, Vista, Oceanside, Carlsbad and San Marcos, among many other local communities.
Many locals went onto social media to share what they experienced.
Professional skateboarder and Encinitas resident Tony Hawk tweeted “Earthquake!” on his Twitter page. He then added: "Reading stories to my daughter and the bed started shaking. It was either earthquake or exorcist."
Meanwhile, a Santee resident said she felt the earthquake at the Santee Drive-In, adding that it “made the car sway.”
In Orange County, the quake caused some damage, including reports of hydrants being knocked off, to things like wine, liquor and product bottles falling off shelves at a store in Buena Park, Calif.
Of course, people are wondering if the 5.1-magnitude quake was the big one.
San Diego-based geologist Pat Abbott said we really have no way of knowing, but these quakes, the three tonight and one a couple of weeks ago, could actually be quakes leading up to a bigger one.
So why is it that some people felt this one and others didn't?
Abbott told NBC 7 that no two people are going to feel an earthquake in the same way.
“The seismic waves don't shake everyone the same. We hear a number like 5.1., but does everyone feel it? No. Are you on the top floor? Are you on the bottom floor? Are you on this section of the couch or that one? There are all types of factors into who feels what," he explained.
As for the chance of another, bigger earthquake striking Southern California in the next couple of days, Abbott said that is not up to science, but rather, history.
Based on history, we have a 2 to 3 percent chance of a larger quake hitting soon, he said.
Did you feel the earthquake? If so, where in San Diego County were you when it struck?