Is California divided into a northern California and a southern California, or is it divided into northern, central, and southern? What are the proper boundaries of these regions? - Quora
Where Does Southern California Stop and Northern California Start? - Bay Area Telegraph
Where Does Southern California Stop and Northern California Start? - Bay Area Telegraph
The curious spot where Northern and Southern California meet
In search of a California dividing line, where Giantslandia starts and Dodgersville ends - Lookout Local Santa Cruz
Pacific DC Intertie - Wikipedia
If Northern and Southern California were to split into separate states, where would the dividing line be? - Quora
The Great California ShakeOut - Inland Southern California area
Seafloor Faults off Southern California
Is the 36° north parallel line the dividing line between Southern California and Central California? - Quora
Morning Lookout: Yummy gifts, comics, Omicron and an MLB lockout - Lookout Local Santa Cruz
Where Does Southern California Stop and Northern California Start? - Bay Area Telegraph