Magnitude, Concord and Earthquake

An earthquake with a preliminary magnitude of 3.7 shook San Francisco on Friday morning, the U.S. Geological Survey said. The ...
A 3.7-magnitude earthquake shook the San Francisco Bay Area in Northern California, the U.S. Geological Survey reported. The ...
The quake occurred at 8:49 a.m. Sunday between Clayton and Willow Pass roads in Concord, according to the USGS.
A magnitude 4.7 earthquake struck in California's Lake County on Wednesday afternoon, the U.S. Geological Survey said. The ...
California was hit by a minor 3.7 magnitude earthquake early on Friday, according to the United States Geological Survey ...