地震学报2012，Vol.34Issue(2)：202-214,13.DOI:10.3969/j.issn.0253-3782.2012.02.007
首都圈地区爆破、矿塌和天然地震的识别研究
Discrimination between explosions, mine collapses and earthquakes in capital region of China
摘要
Abstract
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, vertical component first motion of explosion seismic records is upward, and that of mine collapses is downward, while that of earthquakes depends on station distribution. The surface wave of explosion and mine collapse develops well. 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 ampli-tude spectrum for earthquakes are the highest, and that for explosions are secondary high, while the corner frequencies for mine collapses are the lowest. When epicenter distance is smaller than 200 km, the peak frequencies of explosion amplitude spectrum are mainly 5-7 Hz, and that of collapses are 2-4 Hz, while the peak frequencies of earthquakes are high in the range of 10-18 Hz. The wave frequency range of earthquakes is the widest, and that of explosions and collapses are next-wide.关键词
爆破/矿塌/天然地震/时间域/频率域Key words
explosion/ mine collapse/ earthquake/ time domain/ frequency domain分类
天文与地球科学引用本文复制引用
刘莎,杨建思,田宝峰,郑钰,姜旭东,徐志强..首都圈地区爆破、矿塌和天然地震的识别研究[J].地震学报,2012,34(2):202-214,13.基金项目
地震行业专项基金(200708009)资助. （200708009）
