关键词: 大地电磁, 地形校正, 倾斜地形, TM极化模式

Abstract: The affection of a two dimension inclination terrain mainly causes the distortion of the TM mode data,that decreases apparent resistivity curves of the TM mode. The affection could be ignored if the inclination angle is less than 10 degrees. The affection becomes more severe,as the inclination angle increases. The affection are also related with periods,the longer the period,the more severe the distortion causes,and remarkably affected periods become shorter as the inclination angle increases. In order to reduce these affections,two kinds of models which are homogenous half space with a flat surface and with a slope surface are respectively considered,magnetotelluric (MT) response functions have been computed and correction coefficients have been obtained.

Key words: Magnetotelluric (MT), Topographic correction, Inclination topography, TM-polarization mode