ABSTRACT
Raison d’ etre: Part 1 deals with the Geostructural Environment of Tsunami Genesis. It is based on the dictum, “The Past is the key to the Future”. By tracing the geostructural environments in which the tsunamis were generated in the past, and their periodicity, we identify the sites wherefrom and when they could possibly get generated in the future. The vulnerability of a given coastal site to tsunami damage is dependent on the slope and morphology of the coast. In order for an earthquake to generate tsunami, the magnitude should be ≥7.9, the nature of faulting should be either thrust or normal, and the earthquake should be shallow enough to cause vertical uplift in the ocean floor. Paleo-tsunami records are useful for extending the magnitude and frequency record of the tsunamis back in time.
