扎兰屯地区中小地震重新定位研究
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摘要
以内蒙古地震台网观测报告的震相数据为基础,运用双差定位方法对扎兰屯地区地震重新定位,获得149个地震的重新定位结果。显示扎兰屯地区的孕震层主要分布在5～15km,在上、中地壳,地震簇状分布较明显,主要呈NE向分布;研究区域西北侧震源深度较浅,东南侧较深,大兴安岭山脊区域震源深度分布下限较深。
Based on the seismic phase data reported by the Inner Mongolia Seismic Network,the double difference location method is used to relocate the earthquakes in Zhalantun area,and 149 earthquakes are relocated.The results show that the seismogenic layers in Zhalantun area mainly distribute in 5-15 km,and in the upper and middle crusts,the seismic cluster distribution is obvious,mainly in NE direction.The focal depth of the northwest side of the study area is shallow,the southeast side is deeper,and the lower limit of focal depth distribution in the Great Hinggan Mountains ridge area is deeper.
Based on the seismic phase data reported by the Inner Mongolia Seismic Network,the double difference location method is used to relocate the earthquakes in Zhalantun area,and 149 earthquakes are relocated.The results show that the seismogenic layers in Zhalantun area mainly distribute in 5-15 km,and in the upper and middle crusts,the seismic cluster distribution is obvious,mainly in NE direction.The focal depth of the northwest side of the study area is shallow,the southeast side is deeper,and the lower limit of focal depth distribution in the Great Hinggan Mountains ridge area is deeper.
引文
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[2] Waldhauser F,Ellsworth W L. A Double-Difference Earthquake Location Algorithm:Method and Application to the Northern Hayward Fault,California[J].Bulletin of the Seismological Society of America,2000,90(90):1353-1368.
[3]王未来,吴建平,房立华,等.2014年云南鲁甸Ms6.5地震序列的双差定位[J].地球物理学报,2014(9):3042-3051.
[4]康英,杨选,黄文辉,等.阳江地区地震双差定位及其活动图像分析[J].中国地震,2007,23(3):295-302.
[5] Kissling E,Ellsworth W L,Eberhart-Phillips D,et al.VELEST-Usersguide1995[J].2013.
[6]李英康,高锐,姚聿涛,等.大兴安岭造山带及两侧盆地的地壳速度结构[J].地球物理学进展,2014,29(1):73-83.
[7]秦双龙.双差定位方法的研究[J].克拉玛依学刊,2009(6):201-202.