利用日本9.0级强震检定gPhone重力仪探测地球自由振荡的有效性

英文篇名：EFFECTIVENESS BY USING GPHONE GRAVIMETER FORDETECTIING THE EARTH'S FREE OSCILATION EXCITED BY JAPAN Ms9.0 EARTHQUAKE
中文刊名：大地测量与地球动力学
英文刊名：Journal of Geodesy and Geodynamics
作者：刘正华 ; 李辉 ; 郝洪涛 ; 韦进 ; 刘子维
英文作者：Liu Zhenghua{1)} ; Li Hui{1 ; 2)} ; Hao Hongtao{1 ; 2)} ; Wei Jin{1 ; 2 ; 3)} and Liu Ziwei{1 ; 2 ; 4)}1)Institute of Seismology ; China Earthquake Administration ; Wuhan 4300712)Crustal Movement Laboratory ; Wuhan 4300713)School of Geodesy and Geomatics ; Wuhan University ; Wuhan 4300794)School of Computer Science ; Wuhan University ; Wuhan 430079
中文关键词：gPhone重力仪 ; 地球自由振荡 ; 功率谱密度 ; 日本9.0级地震 ; HB1模型
英文关键词：gPhone gravimeter ; Earth's free oscillations ; power spectral density ; Ms9.0 Japan earthquake ; HB1 model
出版日期：2011-06-15
机构：中国地震局地震研究所;地壳运动与地球观测实验室;武汉大学测绘学院;武汉大学计算机学院;
年：2011
期：S1
出版单位：大地测量与地球动力学

摘要

利用北京、沈阳、格尔木、乌什等4个台站型gPhone重力仪的观测资料,检测日本9.0级大地震的地球自由振荡,将检测结果与SG以及HB1模型进行对比,结果表明0S0-0S48基频自由振荡的实测周期值与SG以及HB1模型的理论值基本一致,从而证实gPhone重力仪能有效地检测出地球自由振荡信号,同时也从相应高频范围内表明了gPhone重力仪秒采样观测资料的可靠性。检测还发现了0S2、0S3的谱线分裂现象。
Utilizing the gravity data of the gPhone gravimeters(at Beijing,Shenyang,Golamd,Wushi stations) during the Ms9.0 Japan earthquake that broke out in 2011-03-11,we succeed in detecting the Earth's free oscillations from-0S-0 to-0S-{48},in addition,we observed the spectra splitting of the-0S-2,-0S-3.Compared with the HB1 model,the observed period of-0S-0——0S-{48} coincide with the results from super conducting gravimeter and the HB1 model.Thus it is confirmed that the gPhone gravimeter can effectively detect the Earth's free oscillations,and to a certain extent,that the sample data by second are reliable.

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