The effects of sliding block as a kind of submarine mass movements on the tsunami amplitudes

The aim of this study is to contribute to understanding of the effects of submarine mass movement, 'sliding block', on tsunami amplitudes using basic source model. This study aims to see effect of movement as a block differently from pioneering studies that investigate submarine landslide and its effects on tsunami amplitudes. To define model, two sliding blocks moving with different velocities in different directions are considered. The differences of tsunami peak amplitudes among the sliding blocks' movements in different depths and distances are compared. The interaction of near fiel tsunami amplitudes are discussed with different velocities, depths and distances. In the model, mass is conserved. Laplace and Fourier transform methods are used for the solution of equations and linearized shallow water wave theory is assumed.. The results show that during the source process, when the velocity of masses are much faster than velocity tsunami, the displacements on the free surface above the source resembles the displacement of the floor. Results for tsunami peak amplitudes are presented for mentioned parameters. The effects of sliding block slide as a kind of submarine mass movements on the tsunami amplitudes and the interaction of the tsunami wave forms are examined for specified parameters and illustrated.