A temblor with a preliminary magnitude of 4.4 that struck two miles from Yorba Linda Tuesday night was followed by at least one aftershock, according to the U.S. Geological Survey (USGS).
The first earthquake struck about five miles below the surface at about 11:23 p.m., according to USGS. At 11:25, a quake estimated at 2.7 magnitude struck in the same area, centered two miles from Yorba Linda.
The 4.4 quake's epicenter was located five miles from Placentia; 6 miles from Chino Hills and 8 miles from Orange. The LA Civic Center was 29 miles away from the quakes epicenter.
There were no injuries or damage immediately reported following the quake, but that all fire resources were placed in "Emergency Earthquake Mode," Matt Spence with LA Fire Department said in an email statement Tuesday night.
Firefighters from all 106 neighborhood stations were surveying 470 square miles in the Greater Los Angeles area, Spence said, inspecting residential buildings, school, powerlines and transportation infrastructures.
Within minutes, hundreds of NBCLA Twitter followers and Facebook fans reported feeling the quake.
"Strong jolts in Whittier. Not looking forward to any after shocks," YeaMe Ceazon wrote on the NBCLA Facebook page.
Residents in Fontana, Anaheim Hills, Torrance and Long Beach also reported feeling the quake.
"I was lying on my livingroom floor of my mobile home in Hermosa Beach, watching the Olympics, when I felt some distinct shaking, light shaking, but it felt like a steady 10-second or so shaking," Karen told NBC4 News in an email.
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