Tsunami
A tsunami is a series of long-wavelength ocean waves caused by large, abrupt displacement of water, most often from undersea earthquakes at subduction zones. Traveling across entire ocean basins at jet-plane speeds in deep water, tsunamis grow dramatically in height near coasts, producing destructive inundation and currents. Modern detection and warning systems combine seismic networks, deep-ocean pressure buoys, coastal tide gauges, and international coordination to reduce loss of life. The deadliest recorded tsunami followed the 2004 Indian Ocean earthquake, with roughly 228,000 fatalities across multiple countries.
