A seismic event occurred in the region, triggering a shake alert on phones in the Bay Area. The alert indicated that the quake was located at a distance of 117 miles from San Francisco. 6 for the quake.

The epicenter of the quake was in Redwood Valley, which is in Mendocino County. Further details about the quake are available from the United States Geological Survey and other sources, including KRON4, which initially reported the shake alert and quake information.