The Magnetic Field of the Earth

History of geomagnetism and paleomagnetism - discovery of the main magnetic elements, fossil magnetism and the magnetic field in the past, investigations of the external magnetic field, origin of the earth's magnetic field; the present geomagnetic field - analysis and description from historical observations - magnetic elements and charts, spherical har-monic description of the earths's magnetic field, uniqueness and other mathematical problems, geomagnetic secular variation, the external magnetic field; foundations of paleo-magnetism - rock magnetism, magnetic mineralogy, paleo-magnetic directions and poles, paleointensity methods, age determinations; the recent geomagnetic field - paleomagnetic observations - archeomagnetic results, analysis of recent lake sediments, geomagnetic excursions, the geomagnetic power spectrum; reversals of the earth's magnetic field - evidence for field reversal, marine magnetic anomalies, analysis of reversal sequences, polarity transitions; the time-averaged paleomagnetic field - geocentric axial dipole hypothesis, second-order terms, variation in the earth's dipole moment, paleosecular variation from Lavas (PSVL); processes and pro-perties of the earth's deep interior - basic principles - seismic properties of the earth's interior, chemical and physical properties, thermodynamic properties of the earth's deep interior, thermal history models, non-dynamo models for the earth's magnetic field, fluid mechanics fundamentals, energy sources; introduction to dynamo theory - the dynamo problem, the magnetic induction equation, the a and v effects of dynamo theory, waves in dynamo theory, symmetries in dynamo theory, theories for geomagnetic secular variations and magnetic field reversals; dynamo theory - vector spherical harmonics, kinematic dynamos, Cowling's theorem and other constraints, turbulence in the core, dynamo waves, dynamics of the geodynamo; the magnetic fields of the sun, moon, and planets - origin of the solar system, the sun, the moon, meteorites, magnetic fields of the planets, geomagnetic relevance; examples of synthesis - fluid velocities in the core, core-mantle coupling - length of day, paleomagnetism and dynamo theory, variations at the core-mantle boundary and the earth's surface.