应用GPS观测资料反演潜在震源参数

英文篇名：INVERSION OF POTENTIAL FOCAL PARAMETERS WITH GPS DATA
中文刊名：大地测量与地球动力学
英文刊名：Crustal Deformation and Earthquake
作者：陈绍绪 ; 李延兴 ; 张跃刚
英文作者：Chen Shaoxu\+\{1)\} ; Li Yanxing\+\{2)\} and Zhang Yuegang\+\{1)\} 1)Earthquake Administration of Hebei Province ; Shijiazhuang\ 050021 2)First Crust Monitoring and Application Center ; CEA ; Tianjin\ 300180
中文关键词：GPS ; 反演 ; 潜在震源 ; 模型 ; 孕震参数
英文关键词：GPS ; inversion ; potential hypocenter ; model ; seismogenic parameter
出版日期：2004-02-29
机构：河北省地震局,中国地震局第一监测中心,河北省地震局石家庄050021 ,天津300180 ,石家庄050021
年：2004
期：01
出版单位：大地测量与地球动力学

摘要

根据点源孕震力学模型 ,应用福建台湾地区GPS位移速度资料反演 1999年台湾南投Mw7.6大震前的孕震参数。反演所得的震中与实际发生的地震震中相差 6 7km ,主压应力场方向为 319.9°,倾角 - 2 8.6° ,即仰角2 8.6° ,与用震源机制解得到的P轴方向和倾角分别相差 17°和 8.6° ,与菲律宾板块向亚洲板块挤压的方向是一致的。用土耳其地区GPS位移速率资料反演 1999年土耳其Mw7.6地震前的孕震参数 ,反演得到的震中与实际震中相差 70km ,主应力方位角和倾角分别为 16 2 .5°、11.5°,与震源机制解结果分别差 2 4 .5°和 1.5°。
On the basis of the point source model, the seismogenic parameters of Nantou \%M\%\-w7.6 earthquake occurred in Taiwan in 1999 are inversed with GPS displacement data observed in Fujian Taiwan area. The results show that the inversed epicenter is only 67 km from the real epicenter. The principal stress direction is 319.9°, and the dip angle is -28.6°, i.e. the elevation is 28.6°. It can be seen that there are only 17°and \{8.6°\}differences from the P direction and the dip angle of focal mechanism solution, and the results are well consistent with the compressional direction of Philippine plate to Asia plate. The epicenter inversed with GPS data observed in Turkey area for Turkey \%M\%\-w7.6 earthquake in 1999 is only 70 km from the real epicenter. The principal direction and dip angle is 162.5° and 11.5° respectively, and there are only 24.5° and 1.5° differences from the results of focal mechanism solution.

引文

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