In search of a California dividing line, where Giantslandia starts

If Northern and Southern California were to split into separate states, where would the dividing line be? - Quora

What is the dividing line or geographical feature between Northern and Southern California? - Quora

What is the dividing line or geographical feature between Northern and Southern California? - Quora

If Northern and Southern California were to split into separate states, where would the dividing line be? - Quora

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

What States Border California? - WorldAtlas

What is 'the Big One' Earthquake, When is it Coming? – Jumpstart Blog

Morning Lookout: Yummy gifts, comics, Omicron and an MLB lockout - Lookout Local Santa Cruz

Seafloor Faults off Southern California

Overdue? The future of large earthquakes in California