Mendocino County 5.6 Earthquake Triggers Alerts, No Damage

A moderate earthquake struck Northern California on Wednesday morning, shaking a remote area of Mendocino County and triggering widespread early warning alerts. The magnitude 5.6 temblor occurred at 8:10 a.m. local time and was centered about 7 miles north of Redwood Valley, roughly 140 miles northeast of San Francisco, according to the U.S. Geological Survey.

The quake, which had a shallow depth of about 5 miles, was felt across a broad region, including in Fort Bragg, Sacramento, and the San Francisco Bay Area. Despite the wide reach of the shaking, officials reported no immediate injuries or significant damage. A smaller magnitude 2.5 aftershock was recorded near the epicenter a few minutes later.

The event activated the statewide ShakeAlert Earthquake Early Warning System, sending alerts to nearly 657,000 people via the MyShake app. Many residents, particularly those farther from the epicenter, received notifications on their phones seconds before feeling any shaking. The system is designed to provide crucial seconds of warning for people to take protective action.

California Governor Gavin Newsom was briefed on the earthquake, and his office stated it was coordinating with...