MSDP单纯型和HYP2000定位方法对比分析
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摘要
采用MSDP单纯型方法和HYP2000定位方法,对宁夏地区2008—2010年发生的232次M_L≥2.0地震和83个爆破资料,从地震震中、震源深度、残差分布3方面进行对比分析。结果显示,采用HYP2000定位方法,震源距断裂带更近,小震群更为集中;震源深度的分布更为符合实际;残差分布明显小于MSDP单纯型定位法。由此建议,近震定位首选HYP2000定位方法。
Recordings and materials of 232 earthquakes(M_L≥2.0)and 83 blasts happened during 2008 to 2010 in Ningxia were compared and analyzed by MSDP system simplex location method and HYP2000 location method in the earthquake epicenter,focal depth and the residual distribution three aspects.Compared to MSDP system simplex location method,epicenter is nearer to fracture zones when adopting HYP2000 location method,minor earthquake swarms are more concentrated,the distribution of epicenter depth is more practical,and the distribution of residual error is significantly smaller.Hence,HYP2000 location method should be adopted preferentially when near earthquakes happen.
Recordings and materials of 232 earthquakes(M_L≥2.0)and 83 blasts happened during 2008 to 2010 in Ningxia were compared and analyzed by MSDP system simplex location method and HYP2000 location method in the earthquake epicenter,focal depth and the residual distribution three aspects.Compared to MSDP system simplex location method,epicenter is nearer to fracture zones when adopting HYP2000 location method,minor earthquake swarms are more concentrated,the distribution of epicenter depth is more practical,and the distribution of residual error is significantly smaller.Hence,HYP2000 location method should be adopted preferentially when near earthquakes happen.
引文
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田玥,陈晓非.地震定位研究综述[J].地球物理学进展,2002,(1) :147-155．
杨贵,叶雯燕,陈惠芳.福建台网应用JOPENS系统常用地震定位方法比较[J].地震地磁观测与研究,2009,30(6) :40-43．
杨智娴,陈运泰,郑月军,于湘伟.双差地震定位法在我国中西部地区地震精确定位中的应用[J].中国科学(D辑:地球科学),2003,33(增刊):129-134．
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