Wang Tingting Bian Yinju. 2015: Amplitude attenuation and its application to earthquake and explosion discrimination. Acta Seismologica Sinica, 37(1): 169-179. DOI: 10.11939/jass.2015.01.015
Citation: Wang Tingting Bian Yinju. 2015: Amplitude attenuation and its application to earthquake and explosion discrimination. Acta Seismologica Sinica, 37(1): 169-179. DOI: 10.11939/jass.2015.01.015

Amplitude attenuation and its application to earthquake and explosion discrimination

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  • Published Date: February 01, 2015
  • Based on the small magnitude earthquakes and explosions and quick identification requirements, this paper analyzed the identification ability of first motion amplitude AI and P maximum amplitude AP to S maximum amplitude AS ratios. Considering the impact of propagation paths on different seismic amplitude, this paper selected reasonable amplitude attenuation formula with distance, and invesigated attenuation characteristics of P, S amplitudes which indicates that amplitude of explosion attenuated faster than that of earthquake. We chosen 100 km as attenuation correction distance and recalculated the ratios of P amplitude to S amplitude after attenuation correction, then it is shown that the correct recognition rate of AI/AS improved from 84% to 98%, AP/AS improved from 92% to 100%. These results show that amplitude ratio criteria after attenuation correction could be better applied to small magnitude earthquakes and explosions recognition.
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    1. 张小咏,朱俊杰,许建华. 基于灯光遥感图像的地震灾情信息提取. 地震研究. 2018(02): 311-318+344 .

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