Discrimination between Explosions, Mine Collapses and Earthquakes in Capital Region of China
详细信息
- 责任者：Liu Sha (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Yang Jiansi
- 刊名：Acta Seismologica Sinica
- 出版年：2012
- 卷期：34(2)
- 关键词：爆破 ; blasting ; 地震活动性 ; seismicity ; 北京 ; Beijing ; 天津 ; Tianjin ; 河北 ; Hebei Province
- 页码：p.202-214
- 图表：6 illus., 7 tables, 34 refs.
- 分类号：0500
- issnNo：ISSN0253-3782
- isbnNo：CN11-2021/P
摘要
///Choosing seismic data of explosions, collapses and earthquakes with ML in the range of 2.0~2.2 during August 2008 to September 2009 in capital region,and analyzing and comparing the data in time and frequency domain, this paper studies how to identify the explosion, mine collapse and earthquake. In time domain, the S to P wave amplitude ratio (AS/AP) of earthquakes are larger than that of explosions and collapses. Moreover, energy attenuation of explosions and collapses is faster than that of earthquakes. In frequency domain the energy attenuation of high frequency wave is faster than that of low frequency one. For the events with similar magnitude, the corner frequencies of amplitude spectrum for earthquakes are the highest, and that for explosions are secondary high, while the corner frequencies for mine collapses are the lowest.
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