A 5.3-magnitude quake shook the Channel Islands off the coast of Southern California Thursday, NBC News and The Weather Channel reported.
Residents across North County felt a sharp jolt and a few seconds of shaking, but no damage has been reported.
Scientists at the California Institute of Technology's seismology laboratory in Pasadena, northeast of Los Angeles, said the natural disaster warning system under development for the West Coast gave about 10 seconds of warning before shaking arrived.
Local news outlets reported that the temblor was felt from the western San Fernando Valley city of Woodland Hills to West Los Angeles, and further east toward Burbank.
A USGS map shows the location of a magnitude 5.3 quake that struck off the Channel Islands around 12:30 p.m. Thursday, April 5, 2018.
An quake with a preliminary magnitude of 5.3 has hit off the shore of Southern California.
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Channel Islands National Park spokeswoman Yvonne Menard tells The Associated Press that bricks fells at a ranch building on Santa Cruz Island that dates back to the 1860s.
Veteran seismologist Lucy Jones says earthquakes of such size typically occur about once per year at Southern California.
"We now have no reports of damage or injuries", fire department spokeswoman Margaret Stewart said.
Renowned former USGS seismologist Lucy Jones described the Tuesday afternoon temblor as a "moderate" quake, KTLA reported.