In this paper, the plumb line deflection varied with time (PLV) are calculated with the Vening-Meinesz formula for Xiaguan and Beijing point based on the 28 and 39 campaigns of gravimetry at the local gravity networks...In this paper, the plumb line deflection varied with time (PLV) are calculated with the Vening-Meinesz formula for Xiaguan and Beijing point based on the 28 and 39 campaigns of gravimetry at the local gravity networks in the Western Yunnan Earthquake Prediction Experiment Area and the North China, respectively. Based on the results, we conclude that: (1) the maximum of PLV is under 0.1 double prime and amplitudes of interannual variation are under 0.02 double prime . (2) PLV can be determined with the reliability of 0.01 double prime by the modeling based on the precession of repeated gravimetry. This implies that repeated gravimetry could be used to determine the PLV. (3) There exist some common and different characteristics for the different places and different components. It may provide a new approach for the study on the local or global geodynamic by using repeated gravimetry.展开更多
基金State Natural Foundation (19373018) and the State Science and Technology Target Project (96-913-04-01-03).
文摘In this paper, the plumb line deflection varied with time (PLV) are calculated with the Vening-Meinesz formula for Xiaguan and Beijing point based on the 28 and 39 campaigns of gravimetry at the local gravity networks in the Western Yunnan Earthquake Prediction Experiment Area and the North China, respectively. Based on the results, we conclude that: (1) the maximum of PLV is under 0.1 double prime and amplitudes of interannual variation are under 0.02 double prime . (2) PLV can be determined with the reliability of 0.01 double prime by the modeling based on the precession of repeated gravimetry. This implies that repeated gravimetry could be used to determine the PLV. (3) There exist some common and different characteristics for the different places and different components. It may provide a new approach for the study on the local or global geodynamic by using repeated gravimetry.
