EFFECTIVENESS BY USING GPHONE GRAVIMETER FORDETECTIING THE EARTH’S FREE OSCILATION EXCITED BY JAPAN Ms9.0 EARTHQUAKE
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
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 0S0 to 0S48, in addition, we observed the spectra splitting of the 0S2,0S3. Compared with the HB1 model, the observed period of \-0S0-0S48 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.
Liu Zhenghua ,Li Hui,Hao Hongtao et al. EFFECTIVENESS BY USING GPHONE GRAVIMETER FORDETECTIING THE EARTH’S FREE OSCILATION EXCITED BY JAPAN Ms9.0 EARTHQUAKE[J]. jgg, 2011, 31(Supp.): 46-50.
