DSS hodograph acoustic logging adaptive threshold level algorithm arrivals of longitudinal waves combinatorial optimization earthquakes finite-difference valuation function of the losses value initial signal regions iteration localization parameters longitudinal and transversal waves loss function magnitude method of imitation of annealing minimization of function of losses neural network modeling neural network modelling neural network simulation prediction estimation seismic hazard seismic research short-term warning solution of direct problem source depth the method of reverse transmission error time of longitudinal wave arrival wave arrival time