Abstract
A physical analysis of the generation of tsunami waves by seismic movements of the ocean floor is presented. For a set of strong underwater earthquakes, the work done against hydrostatic pressure during coseismic displacements of the ocean floor and the available potential energy, tsunami energy, are estimated. It is shown that an insignificant part of the earthquake energy (from 0.004% for Mw = 7 to 0.16 % for Mw = 9) is transferred to the tsunami waves, while the work done against the hydrostatic pressure is comparable in absolute value to the earthquake energy estimated by the Kanamori formula.
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This work was supported by the Russian Foundation for Basic Research, project nos. 19-05-00351, 20-07-01098, 20-35-70038.
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Translated by O. Pismenov
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Nosov, M.A., Bolshakova, A.V. & Sementsov, K.A. Energy Characteristics of Tsunami Sources and the Mechanism of Wave Generation by Seismic Movements of the Ocean Floor. Moscow Univ. Phys. 76 (Suppl 1), S136–S142 (2021). https://doi.org/10.3103/S0027134922010076
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DOI: https://doi.org/10.3103/S0027134922010076