Tsunamis will damage allcoastal facilities. This sealevel gauge at Talcahuanowas being used by theChilean Navy to monitorthe 27 February 2010Chile tsunami. During the 11 March 2011 Japantsunami, seven stations weredestroyed or damaged and sixstations stopped transmittingdata leaving JMA unable tofully monitor the tsunami’s severity. Photo courtesy of R. Núñez Gundlach.