Numerical modeling of the generation of long waves by a dynamic seismic source and their propagation in the Black Sea

Nizhniy Novgorod Technical University, Nizhniy Novgorod, Russia

Abstract

[1]  Numerical modeling of generation and propagation of tsunami waves caused by underwater earthquakes in the Black Sea basin is carried out using the model of dynamic seismic source. A number of historical tsunamis are considered as well as possible catastrophic tsunami with large magnitudes from the sources whose location is close to the historical events considered here. The process of tsunami source formation and propagation of tsunami waves in the entire basin of the sea up to 10-meter isobath was considered. Kinematic vertical motion of key-blocks, into which the source of the earthquake is divided, was used to model the seismic source. The obtained results were compared with the data of pressure gauges and results of other authors. The distribution of maximal heights of tsunami waves along the entire Russian coast of the Black Sea was obtained for each calculation. Pressure gauge records were plotted for a number of points at the eastern coast located close to eight Russian cities such as Anapa, where the probability of earthquakes and tsunami is high in the nearest future.

Received 21 November 2006; accepted 15 December 2006; published 24 January 2007.

Keywords: tsunami danger evaluation, seismic danger, region tectonics, shelf zone and continental slope zone, dynamic seismic source.

Index Terms: 3025 Marine Geology and Geophysics: Marine seismics; 3285 Mathematical Geophysics: Wave propagation; 4255 Oceanography: General: Numerical modeling; 4564 Oceanography: Physical: Tsunamis and storm surges; 7209 Seismology: Earthquake dynamics.

Citation: Mazova, R. Kh., and E. A. Tresvyatskaya (2006), Numerical modeling of the generation of long waves by a dynamic seismic source and their propagation in the Black Sea, Russ. J. Earth Sci., 8, ES6003, doi:10.2205/2006ES000212.