The city is on the Pacific coast in the upper northwestern part of California, about south of the Oregon border. Crescent City's offshore geography makes it unusually susceptible to tsunamis. Much of the city was destroyed by four tsunami waves generated by the Good Friday earthquake off Anchorage, Alaska in 1964. More recently, the city's harbor suffered extensive damage and destruction from tsunamis generated by the March 11, 2011 earthquake off Sendai, Japan. Several dozen vessels and many of the docks they were moored to were destroyed as wave cycles related to the tsunamis exceeded .