A magnitude 4.9 earthquake struck at 5:56 p.m. Monday, centered approximately 17 miles northeast of Palm Desert in Riverside County, according to the U.S. Geological Survey. Shaking was reported across a wide area, including throughout San Diego County and along the Southern California coastline.
Earthquake Details
The quake’s effects were felt from San Diego and Chula Vista in the south, extending north to Long Beach and Malibu. A 3.5 magnitude aftershock followed at 6:50 p.m.
Location and Fault Line
The earthquake originated near the San Andreas fault, a major 800-mile-long fault system. This system runs through areas including the Cajon Pass, Coachella Valley, and near the Salton Sea.
Seismologist Tom Rockwell of San Diego State University noted that earthquakes of this magnitude “rarely lead to something bigger,” but acknowledged that 5% of similar events are followed by larger quakes.
Long-Term Seismic Activity
Rockwell also stated that it has been 300 years since a major earthquake occurred on the San Andreas fault. He indicated that the typical interval between such events is around 150 years.
Given the history of the fault line, further seismic activity is possible. It could manifest as additional aftershocks, or, less likely, a larger earthquake. The region may experience continued, smaller tremors in the coming days and weeks.
Frequently Asked Questions
Where was the earthquake centered?
The earthquake was centered about 17 miles northeast of Palm Desert in Riverside County.
Was shaking felt outside of San Diego County?
Yes, shaking was felt along the Southern California coastline, from San Diego and Chula Vista to Long Beach and Malibu.
What did the seismologist say about the possibility of a larger earthquake?
Tom Rockwell, a seismologist at San Diego State University, said that while these quakes rarely lead to something bigger, 5% of the time they do.
How does this recent seismic activity influence your personal preparedness for earthquakes?
