OCEAN WAVES
type: Concept

TSUNAMIS
type: Concept
in scheme: sciencekeywords
definition: Japanese for "wave in bay." A long-period wave generated by rapid displacement of water, such as by seismic disturbances to the sea floor. Tsunamis travel at speeds of about 700 km/h in the open ocean and build to dangerous heights and energy density when their speed slows in shallow waters.