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《Journal of Geodesy and Geodynamics》 2011-02
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GRAVITY ANOMALIES IN BEFORE Ms9.0 EARTHQUAKE IN JAPAN OBSERVED BY CONTINUOUS RELATIVE GRAVIMETER IN CHINA

Wei Jin1,2),Liu Ziwei1,3),Hao Hongtao1),Wu Yunlong1),Kang Kaixuan1),Zhao Bing1),Shen Chongyang1) and Li Hui1)1) Institute of Seismology,CEA,Wuhan 430071 2) School of Geodesy and Geomatics,Wuhan University,Wuhan 430079 3) School of Computer Science,Wuhan University,Wuhan 430079  
After Ms9.0 earthquake in Japan,the data of 17 gPhones and GS15 continuous relative gravimeters 3 days before the huge earthquake were analyzed.It is shown that there were some unknown gravity anomalies of gPhone and GS15 in Wushi,Zhengzhou and Chengdu station.The preliminay analysis shows that the records at Chengdu and Wushi stations had the type of spindle gravity disturbance 16 hours before the Ms7.3 earthquake of Japan in 2011-03-09.And the gravimeter's records in Zhengzhou station had the cylindrical gravity disturbance not only before the Ms7.3 earquake but also the Ms9.0 earquake in Japan.Although the tropical cyclones,the impact of human disturbance and other factor can be ruled out,the relationship between the gravity disturbance and the earthquake in Japan and the data of even more time scale are remained to be further analyzed.
【Fund】: 中国地震局地震研究所所长基金(IS200956041 IS200726019 IS200956045);; 国家自然科学基金(41004030);; 全国重力台网学科中心运行经费(201101008)
【CateGory Index】: P315.725
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