The tsunamis and storm surges are dangerous sea phenomena, however, these admits the possibilities to organize the actions for the evacuation of peoples, will have earliness from a few minutes or a next hours. Fluid mechanics of tsunami shall be defined as high-frequency long wave process, the directly numerical simulation of which requests the large computational resources to meet the space approximation criterion.

Satisfactory results are got when the computational experiment for tsunami wave simulations are makes on a several different scale bathymetry maps simultaneously. This allows optimizing an accuracy of calculations and time duration for the direct computational experiment. Practically for all coastal areas of Kurily islands can be found the execution scheme of such computational experiments, that allows to confirm of practical applicability for the numerical simulation for the operative forecasting of danger an tsunamis and storm surges.

The best cases of realization for numerical solving is a join researches for an information systems and computational experiments, which have to be adapted for operative information receiving from coastal observation stations and to carry out in full accordance to operational tsunami warning service regulations.