gPhone重力仪记录的汶川8.0地震高频信号研究  

HIGH-FREQUENCY SIGNAL RECORDED BY GPHONE GRAVITYMETERS IN WENCHUAN Ms8.0 EARTHQUAKE

作　　者：周磊[1] 申重阳[1,2] 韦进[1,2] 任政堂[1] 

机构地区：[1]中国地震局地震研究所(地震大地测量重点实验室),武汉430071 [2]中国地震局地壳应力研究所武汉科技创新基地,武汉430071

出　　处：《大地测量与地球动力学》2013年第A01期16-19,共4页Journal of Geodesy and Geodynamics

摘　　要：分析了汶川Ms8.0地震时我国6台gPhone重力仪记录的高频同震数字信号,结果表明:1)gPhone重力仪记录的同震信号包括地震波初动和衰减过程,通过与宽频带地震计记录数据比较,可知其为地震破裂过程的真实记录;2)利用重力仪记录信号提取震源时间函数,再采用经验格林函数法对其进行理论地震波图合成,并与他人利用地震计记录的地震破裂过程的反演结果进行比较,证明gPhone重力仪记录的高频信号可用于震源破裂过程研究。The high-frequency data of the gPhone gravimeter recorded during the earthquake is crucial data for researches on the source rupture process . In this paper, we analyzed coseismic signal recorded by six gPhone grav- itymeters in the Wenchuan Ms8.0 earthquake. The results show that ： 1 ） we can completely obtain the seismic wave image showing the initial moments and its decaying process. Compared with the data of the broadband seismometer, we confirmed that observation of gPhone gravitymeter is a true record of the source rupture process. 2） by means of empirical Green＇ s function and synthesizing theory graphics, compared with the inverted results from seismic data, we proved that the high-frequency data of gPhone gravitymeters can be. greatly used in the research of the source rupture process.

关 键 词：gPhone重力仪 汶川地震 高频地震信号 加速度积分 经验格林函数 

分 类 号：P315.726[天文地球—地震学]