Abstract：In this paper, the fractal characteristics of the gravity network in the Sichuan-Yunnan region are studied. The results show that the fractal dimension is 1.43-1.62, which means that the grid spacing of the gravity network is 30-60 km. The network has the capacity to monitor earthquakes of magnitudes larger than Ms5.0. According to the fractal characteristics of the gravity network, and combined with a calculation test, we selected 20’ (about 37 km) grid spacing to grid the gravity change data from 2010 to 2013 in the studied area. The relationship between gravity change and earthquakes is analyzed in detail. The interannual and cumulative gravity changes show that, even after the energy release of the Lushan Ms7.0 earthquake, the gravity is changing dramatically in the southwest of the Longmenshan fault zone and southeast of the Xianshuihe fault zone. The earthquake situation needs to be monitored continually.
HU Minzhang,LI Hui,LIU Ziwei et al. The Gravity Change over Sichuan-Yunnan Region in 2010-2013 and
the Earthquake Monitoring Ability of the Gravimetric Network[J]. jgg, 2015, 35(4): 616-620.
