A series of earthquakes erupted in rapid succession near the vulnerable San Francisco Bay Area on Monday morning, even triggering California's tsunami alert system. The seismic swarm began with a magnitude 3.9 quake at 9.27am ET, and the US Geological Survey (USGS) recorded eight sizeable events in just 40 minutes around San Ramon.
Location and Proximity to Major Cities
San Ramon is less than 40 miles from San Francisco and less than 30 miles from major urban centers such as Oakland, Concord, and San Jose. This proximity raises concerns about potential impacts on densely populated areas, highlighting the region's seismic vulnerability.
Details of the Seismic Activity
The largest earthquake in the swarm measured a magnitude 4.2, with San Ramon in the East Bay serving as the epicenter. This area sits on top of the Calaveras Fault, an active branch of the San Andreas Fault system, known for its history of significant seismic events.
As this is a breaking story, more details are expected to follow. Authorities are monitoring the situation closely, and residents are advised to stay informed through official channels for updates and safety instructions.
