A magnitude 5.6 earthquake strikes near Redwood Valley in Mendocino County, shaking communities and triggering alerts across the Bay Area.The US Geological Survey locates the epicenter at a shallow depth and records at least a dozen aftershocks, the largest near magnitude 2.5.Governor Gavin Newsom is briefed and emergency officials are coordinating damage assessments; no confirmed major injuries or tsunami threat are reported.Scientists warn that elevated stress on the San Andreas and
San Jacinto faults raises long-term earthquake risk and urge preparedness after a 5.1 event earlier this month.