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He Yongfeng, Li Kai, Liu Bingcan. 2015: The characteristics of Lg waves excited by explosion source and spall based on different models. Acta Seismologica Sinica, 37(4): 640-1286. DOI: 10.11939/jass.2015.04.010
Citation: He Yongfeng, Li Kai, Liu Bingcan. 2015: The characteristics of Lg waves excited by explosion source and spall based on different models. Acta Seismologica Sinica, 37(4): 640-1286. DOI: 10.11939/jass.2015.04.010
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The characteristics of Lg waves excited by explosion source and spall based on different models

  • Academy of Armored Force Engineering, Beijing 100072, China

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  • Received Date: July 28, 2014
  • Revised Date: December 11, 2014
  • Published Date: June 30, 2015
    Graphical Abstract
    • Abstract
  • Spall is defined as a secondary seismic source contributing to regional and far field seismic signals generated by underground nuclear explosions.It can modulate the regional phase,i.e.,Lg waves.This paper analyzed the characteristics of Lg waves excited by explosion source and spall based on three typical crustal models by using numerical simulation of theoretical seismograms,then obtained the relationship between the crustal velocity models and the Lg waves excited by explosion source and spall.To explain the generation mechanism of Lg waves,we investigated the variation of S waves induced directly by compensate linear vector dipole (CLVD) source with different epicentral distances.The results indicate that CLVD source plays an important role in generating low-frequency Lg waves by underground nuclear explosions.
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    • References (22)
  • McLaughlin K L,Barker T G,Day S M,Shkoller B,Stevens J L.1988.Effects of Depth of Burial on Explosion and Earthquake Regional Seismograms:Regional Discrimination and Yield Estimation[R].S-CUBED report No.SSS-R-88-9844,Jolla,California.
    Patton H J.1991.Seismic moment estimation and the scaling of the long-period explosion source spectrum[G]//AGU Geophysical Monograph 65:Explosion Source Phenomenology.San Francisco:AGU:239-252.
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