Unfortunately, Santa Cruz is somewhat protected from such an event. Crescent City, Eureka, Half Moon Bay, Seaside, Marina, Morro Bay, Venice Beach, Marina Del Rey, Huntington / Newport Beach, and and bunches of beach towns north of San Diego and Mission Bay would get creamed.
Santa Barbara, like Santa Cruz, faces south.
If the wave came from the northwest, SB might skate by with no damage at all.
I recall a video of a “tidal wave” rolling into Santa Cruz... or thereabouts. Not protected.