Tsunami Travel Time Maps

NGDC, as the World Data Service for Geophysics (including Tsunamis), and the UNESCO-IOC International Tsunami Information Center, collaborated to provide tsunami travel time maps for historical maps using software from the Pacific Tsunami Warning Center.

Maps were generated using Tsunami Travel Times (TTT) software developed by Paul Wessel, Geoware. TTT software calculates first-arrival travel times on a grid for a tsunami generated at a given earthquake epicenter.

NOTE: These maps do not provide information on the height or the strength of the wave, only the arrival times.