HR: 1340h
AN: S33B-1318    [Abstracts]
TI: A preliminary study on correlation between thermal infrared radiation of land surface and borehole strain
AU: * Chen, S
EM: chshunyun@yahoo.com.cn
AF: State Key Laboratory of Earthquake Dynamic, Institute of Geology, China Earthquake Administration, Postbox 9803, Beijing, 100029, China
AU: Ma, J
EM: majin@ies.ac.cn
AF: State Key Laboratory of Earthquake Dynamic, Institute of Geology, China Earthquake Administration, Postbox 9803, Beijing, 100029, China
AU: Liu, P
EM: liupeixun@sina.com
AF: State Key Laboratory of Earthquake Dynamic, Institute of Geology, China Earthquake Administration, Postbox 9803, Beijing, 100029, China
AU: Liu, L
EM: liulq48@hotmail.com
AF: State Key Laboratory of Earthquake Dynamic, Institute of Geology, China Earthquake Administration, Postbox 9803, Beijing, 100029, China
AU: Jiang, J
EM: jingxiang_jiang@163.com
AF: Earthquake Administration of Xinjiang Uygur Autonomous Region, Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumchi, 830011, China
AB: To predict earthquake by using thermal infrared radiation (TIR) is attended widely in recent years although there are still some basic problems to be solved. In fact, earthquake is only one kind of fault activity. Not all fault motions could generate earthquakes. Therefore the shift of research focus from seeking seismic precursors to monitoring processes of current tectonic activity through satellite remote sensing will provide more definite physical evidence and more chances. However, one of the problems that we have to know is how to obtain physical relation between TIR and tectonic deformation. In order to construct physical relation between TIR and tectonic deformation, some works on theoretic analyses and results of borehole strain are accomplished: Firstly, theoretic relation between volume strain and temperature is built up according to tensor decomposition with thermodynamics and elastic strain theory. As for elastic body, there exists definite linear relation between volume strain increment(Δθ) and temperature increment(Δ T): Δ T=α TΔθ, where α is constant and T is initial temperature. Namely, TIR produced by volume change is positive correlated with volume strain increment. Secondly, correlation between land surface TIR and borehole strain is analyzed by taking an example for borehole strain data more than 10 years from Kuerle and Shuimogou stations in Xing Jiang, located nearby Tiemenguan fault and Bogda fault in Tianshan area, respectively. Result indicates that strains are accorded with TIR when volume strain is dominant. When deviatoric strain is dominant, strain of one direction is positively related with TIR while another direction is negative. Consequently, tensor decomposition is helpful to analyze correlation between thermal infrared radiation and crust deformation if strain tensor is decomposed into spherical tensor related with volume strain and deviatoric tensor related with shape change. In sum, there exists definite physical correlation between TIR and crust deformation, which would provide a certain theoretic background for studying current tectonic activity with thermal infrared remote sensing.
DE: 7209 Earthquake dynamics (1242)
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
DE: 7260 Theory
DE: 8040 Remote sensing
DE: 8123 Dynamics: seismotectonics
SC: Seismology [S]
MN: 2007 Fall Meeting