Understanding the earthquake history of a region is key to estimating seismic hazard. To help with this task, geologists look ...

Below California's famed beaches, mountains and metropolitan areas lies a sinister web of earthquake faults — some so ...

The 5.2-magnitude earthquake on Monday shook the ground and nerves in San Diego, but some scientists were already scanning the ocean floor for tremors.

A video from the San Diego Zoo Safari Park taken during an earthquake put complex elephant herd dynamics on display.

The United States Geological Survey recorded a preliminary earthquake of 5.2 about 2.5 miles south of Julian on Monday ...

A magnitude 5.2 earthquake near Julian rattled much of Southern California and Tijuana just after 10 a.m. Monday, prompting brief evacuations in downtown San Diego and shaking cities as far away as ...

The San Diego Zoo Safari Park's elephants raced to protect their calves with an "alert circle" when a 5.2 magnitude earthquake struck Julian in Southern California.

An earthquake with a preliminary magnitude of 5.2 struck in the Julian area of San Diego County Monday, but there were no ...

A 5.2 magnitude earthquake shook Southern California on Monday, according to the U.S. Geological Survey. The quake was centered in San Diego County but was felt as far north as Los Angeles. No ...