Abstract：Continuous gravitational observation data before the Cangwu MS5.4 earthquake of Wuzhou station are analyzed and studied, as well as data before the Hutubi MS6.2 earthquake of Korla station. Ten months’ non-tidal persistent gravity increases at about 5.0 μGal per month are observed at Wuzhou station before Cangwu earthquake and 7 months non-tidal persistent gravity increases at about 5.1 μGal per month are observed at Korla station before the Hububi earthquake. The cumulative variation amplitudes are about 50 μGal and 35 μGal respectively. Environmental interference is eliminated through site verification and theoretical analysis. It is believed that the increase in gravitational non-tidal persistence over several months before the two earthquakes may be related to the seismogenic process. The results of this study can provide an important reference for the construction of continuous gravitational observation earthquake prediction index system.
WANG Xinsheng,HAN Yufei,WEI Jin. Gravity Non-Tidal Variation Characters before the Cangwu MS5.4 and Hutubi MS6.2 Earthquakes[J]. jgg, 2017, 37(12): 1211-1213.
