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Last update: T_KG (01.05.2013)
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Last update: T_KG (01.05.2013)
This is an introductory course to the studies of magnetic and electric fields of the Earth, Sun, and other celestial bodies. It deals with their properties on different spatial and temporal scales, their measurement, mathematical and physcial description and modeling, as well as relations to the physical, chemical, and mineralogical properties of the Earth and its surroundings. |
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Last update: doc. RNDr. Jakub Velímský, Ph.D. (09.09.2020)
Podmínky pro udělení zápočtu:
Získání alespoň 67% bodů za domácí úkoly zadané v průběhu semestru. Úkoly je možné po dohodě i vrátit k doplnění a přepracování. Získání zápočtu je podmínkou pro konání zkoušky.
Forma zkoušky: písemná, bodovaná nebo distanční (telecon) Klasifikace: >=51% dobře/prospěl; >=67% velmi dobře; >=85% výborně Požadavky odpovídají sylabu v rozsahu prezentovaném na přednášce. |
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Last update: T_KG (01.05.2013)
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Last update: doc. RNDr. Jakub Velímský, Ph.D. (06.10.2017)
Lecture + exercises |
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Last update: T_KG (01.05.2013)
Historical introduction. Measurements. Magnetic and geomagnetic coordinates. Geomagnetic maps. Mathematical description --- the Gauss spherical harmonic analysis. Internal and external fields. Geomagnetic dipole, excentric dipole. Paleomagnetism. Magnetization. Inversions. Virtual and paleomagnetic poles. Polar wandering, relations to plate tectonics. Introduction to dynamo theory Dynamo principle. Bullard's disk dynamo. Equations of geodynamo. Kinematic and dynamic dynamo theory. Alfvén's theorem. Magnetic Reynolds number. Cowling's theorem. Alfa and omega effects. Numerical models of geodynamo. Magnetic fields of solar system bodies Sun and its structure, Solar magnetic field and its time variations. Solar wind. Magnetic fields of planets. Short-term vairations of external field Magnetosphere and ionosphere. Movements of charged particles in EM field. Regular variations. Magnetic storms and substorms. Polar lights. Pulsations. Geomagnetic indeces. EM induction in the Earth and electrical conductivity Basic principles. Penetration depth. Magnetovariational and magnetotelluric soundings. Transfer functions. Electrical conductivity of the Earth's mantle, 1-D and 3-D models. Secular variations, geomagnetic jerks, and electrical conductivity of the lower mantle. Core-mantle coupling. |