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Southern California overdue for major earthquake, study says

| Geologists are out with a startling warning that Southern California is overdue for a major and possibly catastrophic earthquake. A new study says it's expected to hit along the San Andreas Fault north of Los Angeles. It could have a magnitude of 7.5 or higher. CBS News science and futurist contributor Michio Kaku, a physics professor at the City University of New York, joins "CBS This Morning" to discuss the threat.