【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。更多还原

【Abstract】 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.更多还原