An earthquake with a preliminary magnitude of 3.4 shook San Bernardino County, California, at 8:48 p.m. The epicenter was roughly 2.7 miles southeast of Loma Linda and 3.6 miles from Redlands at a depth of nearly 10 miles. So far, there have been no injuries or property damage. The California Department of Public Health provides detailed guidelines on how to protect yourself and avoid potential harm during an earthquake.