Analyses on gravity variation before and after the Lijiang earthquake based on a finite rectangular dislocation model  

作　　者：燕乃玲 李辉 申重阳 

机构地区：[1]InstituteofGeographyandLimnology,ChineseAcademyofSciences [2]GraduateSchool,ChineseAcademyofSciences,Beijing100039,China [3]InstituteofSeismology,ChinaSeismologicalBureau

出　　处：《Acta Seismologica Sinica(English Edition)》2003年第2期185-194,共10页

基　　金：Joint Seismological Science Foundation of China (No.101005).

摘　　要：The methods were discussed to calculate the gravity variation due to crustal deformation based on a model of dis-location on a finite rectangular plane. Taking the Lijiang MS=7.0 earthquake as an example the calculating princi-ple of fault parameters were determined, and the results were given. Of particular interests were the characteristics of the gravity variations in different dislocation types. With comparison between the calculated results and the practical measurements, it was found that the model could to some extent account for the observations. But it failed to give explanations to the more far spatial gravity variation.The methods were discussed to calculate the gravity variation due to crustal deformation based on a model of dis-location on a finite rectangular plane. Taking the Lijiang MS=7.0 earthquake as an example the calculating princi-ple of fault parameters were determined, and the results were given. Of particular interests were the characteristics of the gravity variations in different dislocation types. With comparison between the calculated results and the practical measurements, it was found that the model could to some extent account for the observations. But it failed to give explanations to the more far spatial gravity variation.

关 键 词：a finite rectangular dislocation model Lijiang earthquake co-seismic gravity field variations 

分 类 号：P315.726[天文地球—地震学]