Theoretical magnetotelluric (MT) soundings are investigated for a stratified (five-layered) Earth model consisting of two transitional layers with conductivity varying linearly with depth, and three homogeneous layers with constant conductivity. The analytical expressions for the tangential electric and magnetic fields as well as the surface impedance are derived in terms of Airy functions. The effect of the thicknesses of the two transitional layers and the interlayer between them on the MT responses (apparent resistivity and impedance phase) is examined in detail.

中文翻译：

---

具有两个过渡层的分层地球上的大地电磁探测

针对分层（五层）地球模型研究了理论大地电磁 (MT) 测深，该模型由两个电导率随深度线性变化的过渡层和三个具有恒定电导率的均质层组成。切向电场和磁场以及表面阻抗的解析表达式是根据艾里函数推导出来的。详细研究了两个过渡层的厚度和它们之间的夹层对 MT 响应（表观电阻率和阻抗相位）的影响。