Using data of infrasound measurements in Ukraine for explosions and earthquakes identification

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Using data of infrasound measurements in Ukraine for explosions and earthquakes identification

Journal Title: Геодинаміка - Year 2015, Vol 18, Issue 1

Abstract

Purpose. The purpose of research is to determine the possibility of using of infrasound measurements that carried out in Ukraine for verification of registered seismic events and using of infrasound method as one of the criteria for their identification. Methodology. Registration of seismic and infrasonic signals carried out with using of geophysical networks of Main Center of Special Monitoring (MCSM). To register infrasound the small aperture acoustic group systems are used, allowing directional monitoring of events. Processing of seismic signals was carried out using standard procedures adopted in seismology to determine the parameters of the signal source. To handle infrasonic signals method of multi-progressive correlation is used. The assignment of seismic and infrasonic signals to one phenomenon was based on estimated by seismic data source parameters, propagation time of infrasonic waves from it, azimuth to the source and form of infrasonic signals. In case of registration of infrasonic signals by two acoustic groups, the coordinates and time at source compared with data of seismic monitoring. Results. The data on the parameters of 699 seismic events from mining explosions that took place in August 2014 - March 2015 in Ukraine were received. 124 infrasonic response of these events were registered. The limits of sensitivity and range of using of infrasound method for this type of event were determined. The possibility of using of two or more acoustic groups for location of signal source where seismic data is not enough to evaluate its options was described. The difference in the form of infrasound signals from mining explosion and earthquake was determined. Originality On the basis of existing facilities MCSM propose new technology of registering signals from seismic events by seismic-acoustic complex that allows you to record ground industrial explosions at a distance of 200 kilometers, identified characteristics of the main sources of perturbations that allow classification of these disturbances. Practical significance. Infrasound observations together with seismic enable to identify the event, and in some cases further define the parameters of the source. Using these infrasonic measurements in near real mode allows you to use this method for environmental monitoring, rapid assessment of the events that took place, the provision of information in case of emergencies (explosive depots, pipelines, etc.) for rapid response services. In future it is planned to evaluate energy developments by infrasound method to define the features of infrasound propagation, determine the frequency response of seismic and infrasonic signals.

Authors and Affiliations

O. I. Liashchuk

Keywords

infrasound; explosion; earthquake; identification; small aperture acoustic group

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EP ID EP455905
DOI 10.23939/jgd2015.01.036
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