Automatic association method of infrasound signals and earthquake events

Abstract

The present invention relates to an automatic association method of infrasound signals and earthquake events. The method comprises: determining an infrasound station list to be associated; aiming at each infrasound station to be associated, calculating an epicentral distance between each an infrasound station to be associated and an earthquake event to be associated and an azimuth from the station to the earthquake event, determining the retrieval beginning and ending time of the infrasound signals according to the occurrence time of the earthquake event, determining P-phase signals and S-phase signals recorded by the infrasound station, and obtaining the searching beginning and ending time of the infrasound signals; and performing searching of the infrasound signals in the azimuth range of each infrasound station, finding out the infrasound signals according with conditions as infrasound signals for inducing the earthquake event, associating with the earthquake event, and forming a sound and earthquake combination association event. A plurality of signal association constraint conditions and historical information of areas where events are located are integrated to identify the infrasound signals induced by the earthquake events and improve the event analysis accuracy; and moreover, the determination portion in the infrasound monitoring data sequence multi-source signals is removed so as to reduce the signal misjudgement risk.

Description

technical field [0001] The invention belongs to the field of earthquake monitoring, in particular to a method for associating earthquake-infrasound signals, in particular to a method for associating between infrasound signals and seismic events based on seismic seed events. Background technique [0002] Infrasound is not only used for monitoring atmospheric events, but also has a certain monitoring ability for regional mine explosion events and even for long-distance seismic events with large magnitudes. It can not only record the signals of seismic waves directly acting on the station, but also record Infrasonic signals generated by vibrations such as mountains and islands. Through the comprehensive analysis of seismic signals and infrasound signals, more abundant analysis results can be achieved than a single method, which is more conducive to the analysis and identification of event properties. Due to the complexity of the atmosphere and meteorological conditions, the tr...

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Problems solved by technology

[0003] The purpose of the present invention is to provide an automatic correlation method between infrasound signals and seismic events, which solves the problem that the large-scale infrasound network monitoring infrasound signals cannot be automatically matched and correlated with global seismic events, and can also reduce the risk of signal misjudgment ;On the basis of automatic seismic data processing or manual interactive analysis, the effective correlation between different acoustic phase infrasound signals and seismic events can be realized, and technical support can be provided for the combined analysis of waveform data of seismic monitoring and infrasound monitoring.

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