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Geomagnetism and Geoelectricity for Ph.D. Students

Class at Faculty of Mathematics and Physics |
NDGF014

Syllabus

* The Earth's magnetic field

The present geomagnetic field (GMF). Magnetic and geomagnetic coordinates and poles. Geomagnetic charts. Principles of the main geomagnetic devices and methods of measurment. Mathematical description of GMF - Gauss spherical harmonic analysis. Internal and external Earth's magnetic field. Geomagnetic dipole, excentric dipole.

* Time variations of the GMF a) Slow changes of the internal field Paleomagnetism. Rock magnetization. Virtual poles, paleomagnetic poles. Apparent polar wander paths. GMF reversals. b) Transient variations of the external field The magnetosphere. Charged particles in the magnetosphere. Regular variations of GMF. Storms and substorms. Aurora. Pulzations. Magnetic indices.

* Magnetic fields of the bodies of the solar system

The Sun and its structure. Magnetic field of the Sun. Solar wind. Magnetic fields of planets.

* Generation of the Earth's magnetic field

Bullard disc dynamo. The equations of the Earth's dynamo. Kinematic dynamos. Dynamics of the geodynamo.

Annotation

Mathematical description of the geomagnetic field. Time variations of the geomagnetic field.

Paleomagnetism. Reversals of the Earth's magnetic field.

Transient magnetic variations of the external field. Magnetic fields of the Sun, Moon and planets.

Introduction to the dynamo theory.