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In Redondo Beach, for instance, a near-shore tsunami could bring waves of up to 11 feet above mean sea level, compared to 9 feet possible coming from a distant earthquake.

Data published in both the city and county of Los Angeles’ hazard mitigation plans show how locally generated tsunamis could reach heights of up to 5 feet above the mean sea level in Marina del Rey; 7 feet in Manhattan Beach and San Pedro; 8 feet in Long Beach and the Santa Monica Pier; 9 feet in Malibu; and 30 feet on Catalina Island — depending on the fault that ruptures or where an underwater landslide is triggered.

And in the San Francisco Bay Area, near-shore tsunami could cause waves to surge 4 feet above mean sea level at San Francisco’s Aquatic Park, Alcatraz Island, Redwood City and Richmond; 5 feet in Alameda; 6 feet at San Francisco’s Ocean Beach; 7 feet in Sausalito; 8 feet in Pacifica in San Mateo County; and 9 feet in Bolinas in Marin County, according to the California Geological Survey.

The maximum projected distant-source tsunami could bring waves of 15 feet above the mean sea level to Marina del Rey, the Santa Monica Pier, Naples and Alamitos Bay; 14 feet elsewhere in other parts of Long Beach; 10 feet at Manhattan Beach, San Pedro and the ports of Los Angeles and Long Beach; 9 feet in Malibu, Redondo Beach and Palos Verdes Hills; and 8 feet at Leo Carrillo State Beach.

A near-source tsunami could bring waves of up to 15 feet above the mean sea level in the city of Marina, 9 feet at the Salinas River; 8 feet at the Pajaro River and Sand City, just northeast of Monterey, and 6 feet at Moss Landing, according to data published in Monterey County’s hazard mitigation plan.