Question

Why do earthquakes occur in California?

Answer 1

Southern California Earthquakes and Faults. The earthquakes of California are caused by the movement of huge blocks of the earth's crust- the Pacific and North American plates. The Pacific plate is moving northwest, scraping horizontally past North America at a rate of about 50 millimeters (2 inches) per year.

Answer 2

Southern California overdue for major earthquake, study says