In search of a California dividing line, where Giantslandia starts

Dodgers vs. Giants in 2021 NLDS: Everything you need to know - Los Angeles Times

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

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Earthquake early warning system challenged by the largest SoCal shock in 20 years

The Big One

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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

The Great California ShakeOut - Inland Southern California area

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Drawing the line on CA cultural divide - Daily Trojan