San Andreas Fault earthquakes caused by deep underground forces

San Andreas Fault earthquakes caused by deep underground forces

Scientists at the University of South California (USC) have detected that the earthquakes registered alongside California’s San Andreas Fault occur much deeper than previously understood. The previous knowledge of the fault indicated that earthquakes are…

Earthquake swarm on San Andreas Fault beneath Salton Sea, California

Earthquake swarm on San Andreas Fault beneath Salton Sea, California

A new earthquake swarm started beneath the Salton Sea in California on August 10, 2020. The risk of a larger earthquake over the next 7 days is considerably elevated due to the swarm when compared to background levels. The southernmost section of the San Andreas…

Ridgecrest earthquakes increase chance of San Andreas tremors

Ridgecrest earthquakes increase chance of San Andreas tremors

In a new study, scientists have warned that the Ridgecrest earthquakes in Southern California in 2019 could increase the chance of a San Andreas Fault earthquake. The probability is higher because the 2019 temblors stressed the Garlock Fault, which links the…

Parkfield segment of San Andreas fault can host large earthquakes

Parkfield segment of San Andreas fault can host large earthquakes

Although magnitude 6 earthquakes occur about every 25 years along the Parkfield Segment of the San Andreas Fault, geophysical data suggest that the seismic slip induced by those magnitude 6 earthquakes alone does not match the long-term slip rates on this part of…

More than 130 quakes after M4.6 NE of Gonzales, California

More than 130 quakes after M4.6 NE of Gonzales, California

Following a M4.6 earthquake that hit just NE of Gonzales, California on November 13, 2017, the USGS has registered more than 130 aftershocks within the 5 km (3.1 miles) of the epicenter. Although most of those aftershocks weren't felt by the Central Coast, the…

Historic earthquakes discovered along San Andreas Fault

Historic earthquakes discovered along San Andreas Fault

In a new study, USGS geologist Dr. Kate Scharer and her team excavated trenches across the San Andreas Fault – near Frazier Mountain in northeastern Kern County – to investigate the timing of sand, mud, and gravel deposits that were episodically ripped…

New fault line discovered near San Andreas in southern California

New fault line discovered near San Andreas in southern California

Scientists from Scripps Institution of Oceanography and the Nevada Seismological Laboratory have discovered a new, potentially significant fault in southern California. Now named the Salton trough fault (STF), the newly discovered fault runs parallel to the San…