Finite element analysis of quasi-static earthquake displacement fields observed by GPS |
| |
| Authors: | Email author" target="_blank">A M?AbolghasemEmail author E W?Grafarend |
| |
| Institution: | (1) Department of Geodesy and GeoInformatics, Stuttgart University, Geschwister-Scholl-Strasse ,24-D , 70174 Stuttgart , Germany;(2) GeoForschungsZentrum Potsdam, Department 1, Geodesy and Remote Sensing, Section 1.1, Geoprocesses and GPS Technology, Telegrafenberg A17, 14473 Potsdam, Germany |
| |
| Abstract: | In order to investigate the ability of numerical techniques in computing seismic displacement fields, a forward problem of dislocation theory is first solved by both analytical and numerical techniques. Convergency of the numerical solution and a comparison with the results of a well-known analytical solution are presented for a particular problem. The results are then used when the numerical technique is applied to the same problem without any information on the dislocation source. The latter results may be applied in an inverse dislocation problem. Numerical techniques are in particular expected to be flexible enough to (1) include internal discontinuities, (2) apply geodetic observations as boundary conditions and (3) model lateral, in addition to radial, material heterogeneities. A model with lateral variation of elastic parameters is considered in the last problem.
Acknowledgments. The authors are most grateful to Y. Okada, National Research Institute for Earth Science and Disaster Prevention, Japan, for providing the Fortran code of his analytical solution. |
| |
| Keywords: | Dislocation theory Forward and inverse dislocation problems Strike-slip fault Finite element |
| 本文献已被 SpringerLink 等数据库收录！ |
|
