RIDGECREST, Calif. (AP) – The two major earthquakes that hit Southern California should alert people across the nation of the need to be prepared for the natural disasters, the state’s governor said as officials expressed relief that the damages weren’t worse. Gov. Gavin Newsom said Saturday that governments must strengthen alert systems and building codes, and residents should make sure they know how to protect themselves during an earthquake. Friday’s earthquake was the largest one Southern California in nearly 20 years. Officials voiced concerns about the possibility of major aftershocks in the days and months to come. No fatalities or major injuries were reported after Friday night’s 7.1-magnitude earthquake, which jolted an area from Sacramento to Mexico and prompted the evacuation of the Navy’s largest single landholding, Naval Air Weapons Station China Lake in the Mojave Desert.