摘要
利用频谱分析方法,对三峡数字遥测地震台网记录的ML2.0以上地震进行统计计算的结果表明:绝大多数构造型地震的拐角频率大于5.0Hz,塌陷型地震的拐角频率分布在2.5～4.5 Hz之间;拐角频率较小的塌陷型地震主要分布于煤矿和岩溶管道发育地区,如秭归泄滩和巴东官渡口、火峰等地;拐角频率较大的构造型地震主要分布在断裂构造带附近。
Statistical analysis on the earthquakes with magnitude greater than 2.0 in the Three Gorges area shows that the tectonic earthquake and collapsed earthquake have different corner frequency. The majority of the former is above 5.0Hz, and that of the latter is comparatively lower, around 2.5 -/ 5Hz. It can be taken as a identification basis, whereas, in real application, we should make comprehensive analysis of many other parameters. The collapsed earthquakes mainly occurred in the region with many mines and Karst, such as Xietan, Zigui county, Huofeng, Badong and so on. And the tectonic ones are prone to occur along the faults.
出处
《大地测量与地球动力学》
CSCD
北大核心
2013年第2期27-30,40,共5页
Journal of Geodesy and Geodynamics
基金
中国长江三峡工程开发总公司专项基金(SXSN/2377)
中国地震局地震研究所所长基金(IS201102643)
关键词
构造地震
塌陷型地震
拐角频率
三峡库区
统计分析
tectonic earthquake
collapsed earthquake
comer frequency
Three Gorges reservoir
statistical analysis
