地震重力观测技术的新发展方向:绝对重力与重力梯度一体化观测  

The new development direction of seismic gravity observation technology:Integrated measuring of absolute gravity and vertical gravity gradient

作　　者：吴琼[1] 许健生[1] Wu Qiong;Xu Jiansheng(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)

机构地区：[1]中国地震局地球物理研究所,北京100081

出　　处：《地震科学进展》2023年第2期49-56,共8页Progress in Earthquake Sciences

基　　金：国家重点研发专项(2018YFC1503801)资助。

摘　　要：高精度绝对重力与重力梯度一体化和阵列式观测可有效提高不同深度重力场源体的识别精度。本文基于中国地震局发布的《中国地球物理站网(重力)规划(2020—2030)》中绝对重力观测技术的不足和发展方向,提出了绝对重力与重力梯度一体化的观测技术思路。在监测中发现,强震孕育过程中壳—幔热物质运移引起的微重力变化信号,有利于提升破坏性地震的中、短期和临震预测能力。有必要进一步拓展重力站网绝对重力控制能力等方面的应用,为我国专业地震台站探索重力观测技术新发展方向。The integrated and array observation of the high-precision absolute gravity and gravity gradient can effectively improve the identification accuracy of gravity field sources at different depths. Based on the shortcomings and development direction of absolute gravity observation technology in the “China Geophysical Station Network(Gravity)Planning(2020—2030)” issued by the China Earthquake Administration,this paper proposes the observation technology idea of the integration of absolute gravity and gravity gradient. By monitoring and discovering the microgravity change signals caused by the transport of shell-mantle hot materials during the incubation of strong earthquakes,the ability to predict medium-term,short-term and near-earthquakes of destructive earthquakes is improved. The application of absolute gravity control capabilities of gravity station networks is further expanded to explore new development directions of gravity observation technology for professional seismic stations in China.

关 键 词：绝对重力测量 重力梯度测量 微重力探测 

分 类 号：P312.1[天文地球—固体地球物理学]