Tsunamis Explained

Tsunamis are fast-moving, long-period wave trains whose flooding, currents, debris, erosion, and repeated surges can threaten coasts, harbors, rivers, islands, and critical infrastructure. This evidence-first guide explains tsunami generation by earthquakes, landslides, volcanoes, and weather; deep-ocean propagation and coastal amplification; seismic, GNSS, DART, tide-gauge, and modeling systems; U.S. warning, advisory, watch, and information products; natural warning signs; evacuation zones, vertical evacuation, household and organizational preparedness, accessibility, ports, utilities, response, cleanup, insurance documentation, fraud prevention, recovery, major historical events, climate context, and global warning architecture. Dynamic alerts and local evacuation instructions are treated as time-sensitive and authoritative.
tsunamis, warning systems, evacuation, coastal risk, DART, NOAA, earthquakes, preparedness, recovery