I lived in LA for much of the 1980s. As soon as I got there, more than 40 years ago, I learned about Portuguese Bend. This is nothing new.
I was a geology student at Cal State Fullerton in 1968. Our professor took us there on a field trip. There had occured recent slippage due to yard and garden watering.
He laughed as he asked us “And why do you think there are steep bluffs and cliffs here in the first place?”
I lived there in the eighties too. We lived in Marina City Club, round buildings on the beach. Our apartment had views of the ocean, Malibu, and downtown LA. We could watch smoke from fires in Malibu and also fires east of LA. There were a few every year,
Wish I still lived there, but I’m very happy in Spokane,, close to relatives and my cat has a nice yard.