Significant Quake and Aftershocks Shake Region, Felt Across Los Angeles and Beyond
A powerful 4.9 magnitude earthquake, followed by several aftershocks, struck the Barstow area in Southern California on Monday afternoon, causing tremors felt across a wide region including Los Angeles, Pasadena, and Glendale. The initial quake hit at 1 p.m. with a depth of nearly six miles, according to the U.S. Geological Survey (USGS).
Widespread Shaking Reported
The earthquake, initially recorded as a 5.0 before being downgraded to 4.9, was centered roughly 13 miles northeast of Barstow in the Mojave Desert of San Bernardino County. The tremors extended as far as Calabasas and Universal City, creating a wave of concern throughout the region. Following the main quake, aftershocks measuring 3.5 and 2.8 magnitudes were recorded, adding to the seismic activity.
Immediate Impact and Safety Measures
Despite the significant shaking, there were no immediate reports of injuries or damage. The San Bernardino County Sheriff’s Department and the California Highway Patrol conducted inspections of key infrastructure, including bridges and overpasses, to ensure public safety. The Los Angeles Fire Department confirmed it had not been placed on earthquake mode.
Seismologists Weigh In
Renowned seismologist Dr. Lucy Jones commented on the earthquake’s proximity to the Calico Fault, noting that such quakes are common in the Mojave Desert. “We have seen quakes this size many times in the Mojave Desert,” she shared on X (formerly Twitter), emphasizing that the distance from the San Andreas Fault means it does not increase the likelihood of a major San Andreas earthquake.
California’s Seismic Activity
California is no stranger to earthquakes, with thousands recorded each year. The majority are minor, but the state experiences around 15 to 20 quakes of magnitude 4.0 or greater annually. This recent quake, while significant, falls within the expected seismic activity for the region.
Shake Alert System
The state’s Shake Alert system successfully sent out a warning 12 seconds before the tremors were felt, showcasing the advancements in early warning technologies. This alert provided residents with crucial moments to prepare and respond to the seismic activity.
Expert Insights on Future Risks
Gabrielle Tapp, a staff seismologist at Caltech, addressed concerns about the earthquake being a potential foreshock to a larger event. She explained that while there is a slim chance (about 5%) of this quake leading to a larger one, the possibility cannot be entirely ruled out. Tapp noted that most earthquakes in Southern California, including this one, are strike-slip quakes, similar to the movement expected along the San Andreas Fault.
Conclusion
Monday’s 4.9 magnitude earthquake in Barstow serves as a reminder of the dynamic seismic nature of Southern California. With no immediate damage reported, the focus remains on monitoring aftershocks and ensuring public safety. Residents are advised to stay informed and prepared for potential future seismic events.
