With a strong enough jolt — a 7.6 -magnitude earthquake - the seafloor under Catalina Island could be violently thrust upward, causing a tsunami along the Southern California coast, according to researchers at the University of Southern California.
In a pair of journal articles published this month, researchers at the Viterbi School of Engineering described the tsunami hazard associated with offshore faults, including one that lies under Santa Catalina Island, just 25 miles off the Los Angeles coast.