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Seismo-acoustic location method for small-magnitude surface explosions

Abstract

The aims of this study were to develop an improved method using infrasound observations at multiple seismoacoustic arrays for locating small-magnitude surface explosions at regional distances and to apply the method to ground-truth blasting events for validation. The location method is based on a nonlinear grid search using the travel times and back azimuths of infrasonic signals generated from the surface explosions and on seismic parameters that are independently determined by routine seismic monitoring systems. Specifically, the method utilizes wind-corrected infrasonic azimuths in grid searching to constrain the grids according to nearness to feasibly real observations. Ground-truth events were recorded by a seismo-acoustic station temporarily operated inside an open-pit mine and then used to investigate the improvement by the location method. The method improved the locating of ground-truth events by approximately 50% compared to the seismic location results.

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Correspondence to Il-Young Che.

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Che, I., Shin, J.S. & Kang, I.B. Seismo-acoustic location method for small-magnitude surface explosions. Earth Planet Sp 61, e1–e4 (2009). https://doi.org/10.1186/BF03352902

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Key words

  • Seismo-acoustic
  • surface explosion
  • grid search