Signs warn of mud slides in Devore, when the area was hit by floods in 2006.

A magnitude 4.4 earthquake struck near Devore, in San Bernardino County, California, the U.S. Geological Survey said.

It said the quake, about 4 kilometers south-west of Devore, happened at 1:48 p.m. UTC and was relatively shallow at about 5.6 kilometers below the earth. Aftershocks of magnitude 3.8 and 3.2 happened a few minutes later and there were more, smaller aftershocks over the following hours.