| Study on a gravity precursor mode of the M_S=7.0 Lijiang earthquake |
| |
| 作者姓名： | 申重阳 李辉 傅广裕 |
| |
| 作者单位： | InstituteofSeismology，ChinaSeismologicalBureau，InstituteofSeismology，ChinaSeismologicalBureau，InstituteofSeismology，ChinaSeismologicalBureau Wuhan430071，China，Wuhan430071，China，Wuhan430071，China |
| |
| 基金项目： | Joint Seismological Science Foundation of China (101005) and the State Key Basic Research Project (G1998040703). |
| |
| 摘 要： | Introduction Earthquake prediction must be based on some kind of precursors. The precursors are some things that will indicate a shock occurrence (MEI, et al, 1993). The information of earthquake precursors comes from a deep-seated interior of crust. Therefore the analysis and pick-up of pre-cursory information should be based on the internal process of crustal movement, which includes the earthquake preparation. Being the weak parts of crust, the slip and dislocation of faults can cause cru…
|
Study on a gravity precursor mode of the M_S=7.0 Lijiang earthquake |
| |
| SHEN Chong-yang LI Hui FU Guang-yu Institute of Seismology,China Seismological Bureau,Wuhan ,China.Study on a gravity precursor mode of the M_S=7.0 Lijiang earthquake[J].Acta Seismologica Sinica(English Edition),2003,16(2). |
| |
| Authors: | SHEN Chong-yang LI Hui FU Guang-yu Institute of Seismology China Seismological Bureau Wuhan China |
| |
| Institution: | Institute of Seismology, China Seismological Bureau, Wuhan 430071, China |
| |
| Abstract: | To study the seismogeny process or the precursory behavior of the 1976 MS=7.0 Lijiang earthquake, we analyze the repeat gravity data with high precision from the Western Yunnan Earthquake Prediction Experiment Area (WYEPEA) and the related results of geology and geophysics survey in this paper. Considering the gross errors caused by observation data and model difference, we have firstly inverted the slip distribution of the main active faults with time based on the robust Bayesian least squares estimation and multi-fault dislocation model. The re-sults show that the slip changes of the faults with time from 1990 to 1997 obviously reflect the preparation process of the Lijiang earthquake. The images of main precursor mode have the characteristic of main shock-after shock type, which is agreement to the model of coupling movement between crust density and crust deformation (DD mode of coupling movement). |
| |
| Keywords: | Lijiang earthquake repeat gravity observation precursor mode time changes of faults slip + |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
