Location method of near-surface multiple hypocenters based on seismic wave depth migration theory

Abstract

The invention relates to a near-surface multiple-focus spot position locating method based on the earthquake wave depth migration theory. The near-surface multiple-focus spot position locating method aims to solve the problem that any multiple-point vibration position in a monitoring area can not be obtained accurately or quickly in the prior art. According to the near-surface multiple-focus spot position locating method, from the perspective of whole earthquake record data obtained by a ground vibration monitoring device, computation on focus positions is carried out through a wave equation migration method, and therefore multiple-focus spot positions in the monitoring area can be obtained accurately. Space transfer processing is carried out on near-surface vibration, earthquake waves received by a ground monitor and spreading along the ground surface, and the like, the horizontal ground surface (x-o-y face) is regarded as the vertical section (x-o-z face) in two-dimensional or three-dimensional earthquake exploration, and therefore ground coordinates (x1, y1), (x2, y2), ..., (xn, yn) corresponding to the focus spots in the monitoring area can be obtained by using the wave equation depth migration method. The near-surface multiple-focus spot position locating method can accurately and quickly obtain any multiple-point vibration position in the monitoring area from the perspective of vibration data recorded by a monitoring station.

Description

technical field [0001] The method of the invention relates to the seismic source point positioning technology, in particular to a near-surface multiple seismic source point position positioning method based on the seismic wave depth migration theory. technical background [0002] Earthquakes are a natural phenomenon. Earthquakes never stop and have always been closely related to the survival of human beings on the earth. After an earthquake occurs, through scientific observation and calculation processes, we can obtain relevant information such as the source location and magnitude of the earthquake. The location of the earthquake source is generally determined according to the travel time of the seismic wave. After the earthquake, due to the different positions of different seismic stations, the shock wave signals transmitted from the source will be received at different times. According to the known positions of multiple stations and the time when they received the vibrat...

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Problems solved by technology

In actual work, if we consider a multi-point vibration situation, such as the ground vibration caused by bombs or other military strikes at multiple places in a certain area at the same time, the above method may face a completely unsolvable problem: every Each monitoring station will receive the vibration signals of all vibration points, and finally we cannot obtain the travel time information from the same point from the data of all monitoring stations.

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