Electromagnetic induction in the Earth
نویسندگان
چکیده
منابع مشابه
Signature of the quiet-time magnetospheric magnetic field and its electromagnetic induction in the rotating Earth
S U M M A R Y Accurate models of the magnetospheric field during magnetically quiet times are essential for high-resolution mapping of core field dynamics, mantle and ocean induction, crustal fields and ionospheric currents. Satellite data sampled at low-Earth orbit allow for a separate determination of the external contributions from currents in the magnetosphere. We have used Ørsted and CHAMP...
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The ionosphere plays a role in radio propagation that varies strongly with frequency. At extremely low frequency (ELF: 3–3000 Hz) and very low frequency (VLF: 3–30 kHz), the ground and the ionosphere are good electrical conductors and form a spherical Earth-ionosphere waveguide. Many giants of the electromagnetics community studied ELF-VLF propagation in the Earth-ionosphere waveguide, a topic ...
متن کاملElectromagnetic Induction Studies
This report constitutes an attempt to review the major developments and identify important trends in the broad field of geophysical electromagnetic nduction and related phenomena over the past four years. Following in the spirit of previous reports of this type [e.g., Filloux, 1979; Hermance, 1983b], the work of US researchers will be emphasized, although we will cover foreign research when app...
متن کاملElectromagnetic Induction ( Paper Ii )
Typical components of a metal detector include a transmitter and receiver coil. As depicted in Figure B.1, electric currents that flow in the transmitter coil radiate a primary magnetic field that penetrates the surrounding medium and any nearby metallic object. A timechanging primary magnetic field will induce so-called eddy currents in the buried object, and these currents in turn radiate a s...
متن کاملA hybrid boundary element-finite element approach to modeling plane wave 3D electromagnetic induction responses in the Earth
A novel hybrid boundary element-finite element scheme which is accelerated by an adaptive multi-level fast multipole algorithm is presented to simulate 3D plane wave electromagnetic induction responses in the Earth. The remarkable advantages of this novel scheme are the complete removal of the volume discretization of the air space and the capability of simulating large-scale complicated geoele...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2007
ISSN: 0096-3941
DOI: 10.1029/2007eo360006