A preliminary magnitude 3.6 earthquake rattled San Bernardino County late Monday evening, marking the third temblor to hit the region within a 12 hour time period, according to the United States Geological Survey.

A 3.5 earthquake occurred Monday near San Bernardino at 9:44 a.m., followed by a 3.0 quake four minutes later. Just before 10 p.m., another 3.5 quake landed.

Some described the double earthquakes in San Bernardino on Monday as quick jolts that rattled nerves and frightened pets in the Victor Valley. A magnitude 3.5 earthquake occurred at about 9:44 a.m. and about 3 miles north-northeast of San Bernardino,