选取内蒙古测震台网2009—2016年内蒙古中西部ML≥2.8中小地震波形记录,采用多台联合反演方法,计算该区中小地震震源谱参数,获得地震矩M0、矩震级MW、应力降Δσ和震源尺度r,利用线性回归,分析近震震级ML、地震矩M0、矩震级MW、应力降Δσ和震源尺度r之间的关系。结果表明,各参数之间存在一定线性关系,内蒙古中西部地区应力降模型为增加应力降模型(ISD)。
Selecting the seismic waveform records of ML ≥ 2.8 earthquakes in the central and western part of Inner Mongolia Autonomous Region from 2009 to 2016, the focal spectrum parameters of the small and medium earthquakes in this area are calculated by multiple joint inversion methods. Seismic moment M0, moment MW, stress drop σ and focal scale r are obtained. By linear regression, the relationships between near earthquake magnitude ML, moment M0, moment magnitude MW, stress drop σ and focal scale r are analyzed. The results show that there is a linear relationship among the parameters, and the stress drop model in the central and western regions of Inner Mongolia is an increasing stress drop model.
2018,39(3): 16-21 收稿日期:2017-07-07
DOI:10.3969/j.issn.1003-3246.2018.03.003
基金项目:中国地震局地震科技星火项目(项目编号:XH15008)
作者简介:李彬(1980-),女,甘肃景泰人,工程师,从事工程地震等工作。E-mail:22187569@qq.com
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