PHYSICAL MODEL FOR TSUNAMIS WAVES
Pages 145-151
I. Cosma
Abstract
The most representative studies about sea waves offer only factual cinematic descriptions of these impressive phenomena. Our work tries to eliminate the information poverty concerning to the tsunamis as a transversal wave motion. Our dynamical model precised the characteristics of a tsunamis wave produced by some shallow submarine earthquake and volcanic eruption. Started from the local variation of hydrostatic pressure and from the fact that the restoring forces have a particular quasielastic character we stated the period, equation, the speed and wavelength of this kind of water waves versus the depth of ocean floor perturbation The evaluated characteristics are in good accord with those observed for the catastrophic tsunamis, from 12/26/2004, caused by undersea Sumatra's earthquake of Richter magnitude greater than 9 deg. and epicenter depth of less than 40 kilometers.