Crustal Deformation during Interseismic Period from SAR Interferometry and Geodetic Observations
Speaker: Geng-Pei Lin
Abstract
SAR Interferometry had proven its efficient to map coseismic deformation due to large earthquakes. Since 1993, Differential Interferometric Synthetic Aperture Radar (DInSAR) was applied to several sizeable seismic deformation events, with benefits like large spatial coverage and high precision. Incorporating with GPS or other geodetic measurements, DInSAR result could be used to solve coseismic fault slip distribution. In recent decade, new approaches of InSAR techniques had been developed for monitor interseismic surface deformation, like Permanent Scatterers Technique, Persistent Scatterers Technique, and Small Baseline Subset (SBAS). These multi-temporal methods provide better spatial-temporal coverage and resolution than conventional DInSAR, based on different theory and different limitations. The results of these techniques are presented as Line-Of-Sight (LOS) mean velocity field and deformation time series. This presentation includes a review of DInSAR concept and an overview for some multi-temporal InSAR techniques with case study.
Reference
Hooper, A., P. Segall, and H. Zebker (2007).Persistent scatterer interferometric synthetic aperture radar for crustal deformation analysis, with application to Volcan Alcedo, Galapagos. J. Geophys. Res., 112. B07407, oi:10.1029/2006JB004763.
Manzo, M., Y. Fialko, et al. (2011). A Quantitative Assessment of DInSAR Measurements of Interseismic Deformation: The Southern San Andreas Fault Case Study. Pure. App. Geophys., 166(8-9), 1425-1459. doi:10.1007/s00024-011-0403-2.
Schmidt, D. A., and R. Burgmann (2003).Time-dependent land uplift and subsidence in the Santa Clara valley, California, from a large interferometric synthetic aperture radar data set. J. Geophys. Res., 108(B9), 2416. doi:10.1029/2002JB002267.