Number | Title | ECTS | Hours | Lecturers |
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651-5104-00L | Deep Electromagnetic Studies of the Earth Prerequisite: Successful completion of Mathematical Methods (651-4130-00L) required. | 3 credits | 2G | A. Kuvshinov,
A. Grayver |
Abstract | The course will guide students in learning about deep electromagnetic (EM) studies of the Earth. These studies focus on analysis and interpretation of long-period time-varying EM field observed at Earth's surface, at sea bottom and at satellite altitudes with ultimate goal to recover electrical conductivity distributions in Earth's interior. |
Objective | Governing equations for these studies are Maxwell's equations and special attention in this course will be paid to the solution of Maxwell's equations in Earth's models with one-dimensional (1-D) and three-dimensional (3-D) conductivity distributions. In addition the basics of inverse problem solutions - as applied to deep EM studies - will be discussed. |
Content | Introduction to deep electromagnetic (EM) studies of Earth (governing equations, conductivity models under consideration, summary of the main EM sounding methods, etc.); basics of magnetotelluric (MT) and geomagnetic deep sounding (GDS) methods; solution of Maxwell's equations in fundamental (layered) Earth's models in Cartesian and spherical geometries; solution of Maxwell's equations - based on integral equation approach - in Earth's models with 3-D conductivity distribution (theory and efficient numerical implementation); solution of EM inverse problems (inverse problem formulation, regularization of the inverse solution, discussion on optimization methods and adjoint approach); basics of data processing; examples of application (use of MT to detect geothermal reservoirs; use of GDS to constrain mantle conductivity; 3-D EM modellings to predict space weather hazards, etc.) |