Geoscience Reference
In-Depth Information
hundreds of experiments. The experimental data are seen to confirm the main pecu-
liarities of the obtained theoretical dependences.
Once again it must be stressed that not to take into account dispersion in describ-
ing the process of tsunami generation may result in significant errors in determining
amplitude and energy characteristics of waves, especially in the case of displace-
ments of the basin bottom not accompanied by residual deformations.
For comparison, Fig. 2.19 demonstrates the results of experiments and theoretical
calculations, performed in [Hammack (1973)]. Note that Hammack only investi-
gated waves excited by piston-like displacements. Moreover, he applied a somewhat
different, smoother time law of the basin bottom deformation. The main charac-
teristics of the dependences, obtained by Hammack and by us for the piston-like
displacement, are identical.
Fig. 2.19 Amplitude
ξ
0
of wave, excited by piston-like basin bottom displacement of amplitude
η
0
as function of the displacement duration
τ
. Adapted from [Hammack (1973)]
