Science Service System
You are here : Home : Proposals_Summary

Summary of Proposal GEO1760

TitleDetecting and monitoring interseismic deformation fields with TerraSAR-X Interferometry at several major seismic zones of China
Investigator Chunyan, Qu - China Earthquake Administration, Institute of Geology, State Key Lab. of Earthquake Dynamics
Team Member
Prof. Qu , Chunyan - Institute of Geology, China Earthquake Administration, State Key Laboratory of Earthquake Dynamics
Prof. Shan, Xinjian - Institute of Geology, China Earthquake Administration., State Key Laboratory of Earthquake Dynamics
SummaryChina is an earthquake-prone country with great loss of earthquake disasters, especially in west China where directly squeezed by Tibetan Plateau, Strong earthquakes occur more frequently and bring huge loss of life and property. So detecting coseismic displacement and monitoring interseismic ground motion for mitigation of seismic hazard and estimation of earthquake risk are very urgent demands. Satellite Interferometry SAR (InSAR) has been proven to be an effective and promising technology for measuring subtle ground deformations with millimeter accuracy. With the InSAR methods, we have measured and analyzed the seismic deformation fields of multi strong earthquakes, such as Mani Ms7.5 earthquake in 1997, Kunlun mountain Ms8.1 earthquake in 2001, Wenchuan Ms8.0 earthquake in 2008 and Yushu Ms7.1 earthquake in 2010, and provided important decision-making basis to seismic emergency rescue and disaster mitigation. In order to overcome the temporal and geometrical decorrelation of radar signals from repeat passes and observe the tiny interseismic crustal deformation which slowly occurring in a long time interval , we recently apply several MT-InSAR techniques, including the PS/CRInSAR, SBAS, and Stacking InSAR for monitoring slow tectonic movement in several important actively tectonic regions of China. All of us can familiarly use professional InSAR software including GAMMA, StaMPS, ROI_PAC to processing SAR data stacks and extracting information. We have already installed more than 100 corner reflectors in main actively seismic zones of China, including Qilianshan-Haiyuan fault zone in west China, Yanqing-Huailai basin in Northwest Beijing and Changbai mountain volcano area. Using these corner reflectors along with permanent scatterers (PS) in the study areas, we can more effectively detect the long term slow deformation fields caused by fault motion and volcano activity, and to greatly improve the reliability of InSAR time-series measurements. In this project we propose to utilize frequent observation and higher resolution X-band SAR data from TerraSAR-X satellite and apply InSAR and MT-InSAR(PS/CRInSAR, SBAS, Stacking) to determine the fast and long term surface deformation associated with earthquakeCfault motion and volcano activity. Our main targets will still be focused on some important active areas previous studied, where we not only have experience with applying ERS and Envisat interferometry, but also collect abundant ground observation data of GPS and leveling. By jointly using these different data, we will conduct integrating study of InSAR, GPS and leveling data to get more reliable deformation map. At the same time, we will calibrate and evaluate the suitability and capability of TerraSAR-X images for InSAR-based analysis through comparison with previous observation results based ERS and NEVISAT SAR data in a same study area, so as to obtain a better knowledge and interpretation of the active surface deformation in study areas. Towards these purposes of the proposal, We need a lot of repeat high resolution TerraSAR-X images. It is anticipated to process at least 200 TerraSAR-x images of StripMap mode total in three study areas. Deliverables will be electronically delivered data.

Back to list of proposals

© DLR 2004-2016