Far-field coseismic gravity changes related to the 2015 MW7.8 Nepal (Gorkha) earthquake observed by superconducting gravimeters in China continent.
Abstract: Using data from five SGs at four stations in China continent, obvious permanent gravity changes caused by the 2015 MW7.8 Nepal (Gorkha) earthquake were detected. We analyzed the gravity effects from ground vertical deformation (VD) using co-site continuous GPS (cGPS) data collocated at the Lijiang and the Wuhan station, and hydrological effects using GLDAS models and groundwater level records. After removing these effects, SG observations before and after the earthquake revealed obvious permanent gravity changes: −3.0 μGal, 7.3 μGal and 8.0 μGal at Lhasa, Lijiang and Wuhan station, respectively. We found that the gravity changes cannot be explained by the results of dislocation theory.
摘要：利用5台超导重力连续观测数据，检测到了明显的远场同震重力变化，比球体位错理论（孙文科老师）模拟结果高1个数量级，且与其他因素，如地下水、降雨、地壳形变几乎不存在相关性。详见EPP论文。
Citation: Xing, L. L., Liu, Z. W., Jia, J. G., Wu, S. Q., Chen, Z. S. and Niu, X. W. (2021). Far-field coseismic gravity changes related to the 2015 MW7.8 Nepal (Gorkha) earthquake observed by superconducting gravimeters in China continent. Earth Planet. Phys., 5(2), 141–148. http:// doi.org/10.26464/epp2021018
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