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Seismo-acoustic location method for small-magnitude surface explosions
Earth, Planets and Space volume 61, pagese1–e4(2009)
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.
Bedard, A. J. and T. M. Georges, Atmospheric infrasound, Phys. Today, Mar., 32–37, 2000.
Brown, D. J., C. N. Katz, R. Le Bras, M. P. Flanagan, J. Wang, and A. K. Gault, Infrasonic signal detection and source location at the Prototype Data Centre, Pure Appl. Geophys., 159, 1081–1125, 2002.
Brown, P. G., R. Whitaker, D. O. ReVelle, and E. Tagliaferri, Multi-station infrasonic observations of two large bolides: signal interpretation and implications for monitoring of atmospheric explosions, Geophys. Res. Lett., 29, 1636, doi:10.1029/2001GL013778, 2002.
Cansi, Y., An automatic seismic event processing for detection and location: the PMCC method, Geophys. Res. Lett., 22, 1021–1024, 1995.
Che, I.-Y., M.-S. Jun, J.-S. Jeon, and K. D. Min, Analysis of local seismoacoustic events in the Korean Peninsula, Geophys. Res. Lett., 29, 1589, doi:10.1029/2001GL014060, 2002.
Evers, L. G. and H. W. Haak, Infrasonic forerunners: exceptionally fast acoustic phases, Geophys. Res. Lett., 34, L10806, doi:10. 1029/2007GL029353, 2007.
Garcés, M. A., R. A. Hansen, and K. G. Lindquist, Travel times for infrasonic waves propagating in a stratified atmosphere, Geophys. J. Int., 135, 255–263, 1998.
Le Pichon, A., J. Guilbert, M. Vallee, J. X. Dessa, and M. Ulziibat, Infrasonic imaging of the Kunlun Mountains for the great 2001 China earthquake, Geophys. Res. Lett., 30, 1814, doi:10.1029/2003GL017581, 2003.
Watada, S., T. Kunugi, K. Hirata, H. Sugioka, K. Nishida, S. Sekiguchi, J. Oikawa, Y. Tsuji, and H. Kanamori, Atmospheric pressure change associated with the 2003 Tokachi-Oki earthquake, Geophys. Res. Lett., 33, L24306, doi:10.1029/2006GL027967, 2006.
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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
- surface explosion
- grid search