San Leandro earthquake strikes San Francisco Bay Area

A magnitude 3.8 earthquake struck near San Leandro, California, on Thursday morning at approximately 8:30 a.m. Pacific time. The United States Geological Survey (USGS) initially reported the magnitude as 4.1 before adjusting it to 3.8. The quake originated at a depth of 5.2 kilometers, with the epicenter located roughly two miles north of San Leandro near the border of Oakland.

The seismic event, which occurred near the active Hayward Fault, was felt across the San Francisco Bay Area, including San Francisco. The shaking caused temporary disruptions to the Bay Area Rapid Transit (BART) system. BART officials briefly halted trains and subsequently operated at reduced speeds to allow crews to inspect the tracks for damage. No damage was reported following the inspections, though commuters experienced delays of up to 20 minutes.

An aftershock was felt approximately 30 minutes after the initial tremor. Scientists continue to analyze data from the event, and the USGS may update shake severity maps as more information becomes available.