METHOD FOR MONITORING NETWORK REGION seismic stations

摘要

FIELD: physics.;SUBSTANCE: network of seismic stations which use pressure sensors as primary velocity sensors are placed in an earthquake-prone region. The ratios of velocities of longitudinal and transverse waves in the earth's crust are determined at different azimuth angles of the route of each of the network of stations. Discrete samples of measurements are obtained for each of the routes in the same time intervals. The Fourier spectra of the obtained samples are determined with determination of weighted average frequencies. The moment of change in weighted average frequencies is identified with the occurrence of an anomalous zone of an imminent earthquake on the measured route. Bearings of the anomalous zone are taken as points of intersection of the radius vectors of velocities of several stations on the measured routes. Signal energy of the calculated spectra is determined and the behaviour of its variation is monitored. The size of the anomalous zone is calculated. The time and magnitude of the expected seismic impact are predicted.;EFFECT: longer time interval for preventive forecast, high accuracy of determining forecast parameters of a seismic impact.;6 dwg