The U.S. Geological Survey reports a 4.6 earthquake, seven miles west of Big Bear Lake. The earthquake occurred just before 10 a.m. Saturday.
Two aftershocks apparently followed, according to the USGS: a 4.4 and a 2.7. The San Bernardino County Sheriff's Department said it had no immediate reports of injuries or damage.
State Route 18 was closed at Glory Ridge while Caltrans cleared a rock slide, a California Highway Patrol dispatcher told KPCC, but it was later reopened.
KPCC administrative employee Taylor Coffman was in Big Bear for the holiday weekend. She says she packing up to leave when she felt the quake.
"There was a thunderstorm happening and then all of a sudden the cabin started shaking. It didn't last very long, but it was definitely dramatic," Coffman said.
Snowplows were dispatched to remove the numerous rock slides that closed the 18 between Big Bear Dam and Snow Valley, City News Service reports.
At least six vehicles were stranded on the road, including an SUV and three motorcyclists, CHP officers said, according to CNS. There were no initial reports of injuries or damaged cars on Route 18.
Near Forest Falls, a compact car on Route 38 hit a rockslide and tore out its undercarriage, CHP officers said, according to CNS. The Volkswagen Golf compact car hit the debris two miles north of Valley of the Falls Drive, and there were no reports of any injuries, the CHP reported.
USGS seismologist Dr. Lucy Jones tweeted that the earthquake was northwest of 1992's 6.3 quake and that it's along a strike-slip fault, but that the fault is too small to be mapped.
A Big Bear resident told KNX radio that docks were bobbing up and down in the lake, CNS reports, and that buildings shook and creaked. One reporter said many people initially thought it was another lightning strike, from the overnight thunderstorms.
Several KPCC listeners tweeted that they felt the quake:
If you felt it, tweet us @KPCC or let us know in the comments.
This story has been updated.