利用地震观测波形直达纵横波能量的差异，在时间域创建标志地震事件震源性质的新参量a，计算182个台站记录的24个地震事件的a值，并用以分析2017年9月3日敏感地区发生的地震事件性质。结果表明，判据a具有良好的震源性质依附效应，从而为地震与爆炸的识别引进了一种新方法。
Characteristics of source physics and wave radiation mechanism of the earthquakes and explosions are briefly introduced. Based on the difference in observed direct P-and S-wave energy, a discriminator a indicating source characteristics is defined in time domain of seismic records. The analyzed result of the 182 station records from 24 seismic events with different source types, and the 20170903 seismic event occurred in sensitive areas, indicates that the a value does vary with source types, showing prospective applicability in seismic source discrimination.
2019,40(6): 1-8 收稿日期：2019-05-20
DOI：10.3969/j.issn.1003-3246.2019.06.001
基金项目：中国地震局2017年度老专家基金课题
作者简介：魏富胜,男,研究员,研究方向:震源物理。E-mail:weifusheng@126.com
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