Abstract:We use the 2010-2012 gravity data from the Ningxia survey network, recalculated by a one degree term of scale parameter of the CG-5 gravimeter. We conduct a comparative analysis of the impact of correction coefficient term grid values at different time scales produced by the gravitational field before the Yinchuan ML5.0 earthquake. Our results show: (1) CG-5 gravimeter one degree scale parameter decreases with time, and continuesa declining trend; (2) different time scale gravity field changes are significantly reduced, highlighting the “0” contour phenomenon.
FENG Jianlin,TAN Yujuan,QIN Jianzeng et al. The Effect of One Degree Term of Chromatic Polynomial of CG-5 Gravimeter on Gravity Change in Ningxia Area[J]. jgg, 2017, 37(3): 319-322.