A magnitude 5.3 earthquake hit California on Tuesday night, and the U.S. Geological Survey said it was not believed to be caused by natural causes.
A report from the California Department of Forestry and Fire Protection said no injuries were reported and no structures were damaged.
No damage was reported to the buildings on the west side of the city of Sacramento, where the quake occurred.
The report said there was a temporary lack of power for about 2,000 homes in the Sacramento area.
A similar quake struck the same area last month, causing some power outages and damaging a local school.
In the hours after the quake, emergency crews worked to restore power to homes.
It took about three hours to restore electricity in Sacramento, said Chris Gage, a spokesman for the U