球面小波在卫星重力数据分析地震形变中的应用研究  

Study on spherical wavelet application in satellite gravity data analysis of the earthquake deformation

作　　者：薛建华[1] 刘超[2] 

机构地区：[1]山西大同大学,山西大同037003 [2]国核电力规划设计研究院,北京100095

出　　处：《工程勘察》2016年第12期56-59,共4页Geotechnical Investigation & Surveying

摘　　要：本文利用GRACE低轨重力卫星能以较高的精度获取包含丰富时变地球动力学信息的重力场数据。采用球面小波分析方法将其数据推求的2008年Ms8.0级汶川大地震期间,中国大陆及邻近地区的同震重力变化进行了多尺度分离处理,分析了不同阶次小波结果对应的重力场变化特征,发现3阶分解结果与地质构造分布对应较好。初步探讨了地震时期重力场的演变情况,为地震、滑坡等自然灾害特征分析和解释提供参考。This article detects the earthquake signal and characteristics by using high-precision gravity field model provided by GRACE satellite. The gravity field variation in China's Mainland and its neighboring regions during the Ms8. 0 Wenchuan earthquake in 2008 is extracted with multi-scale analysis based on the spherical wavelets. The results show that the 3 order component has a good agreement with the distribution of geological structures. The evolution of the gravitational field changes during earthquake period is initially analyzed and gives a reference for the analysis and interpretation of earthquakes,landslides and other natural disasters.

关 键 词：球面小波 重力场 GRACE 同震变化 

分 类 号：P223[天文地球—大地测量学与测量工程]