Publication Type |
pre-print |
School or College |
College of Engineering |
Department |
Electrical & Computer Engineering |
Creator |
Simpson, Jamesina J. |
Title |
Global FDTD maxwell's equations modeling of elctromagnetic propagation from currents in the lithosphere |
Date |
2008-01-01 |
Description |
Electromagnetic wave propagation from electric currents within the Earth's crust is investigated using a three-dimensional finite-difference time-domain (FDTD) full-vector Maxwell's equations model of the global Earth-ionosphere cavity. The FDTD model employed extends from -100 km below sea level to an altitude of -100 km, and can account for arbitrary horizontal as well as vertical geometrical and electrical inhomogeneities and anisotropies of the ionosphere, lithosphere, and oceans. Using this model, the surface horizontal magnetic field is calculated for different depths and orientations of an electric current occurring below the epicenter of the 1989 Loma Prieta earthquake. Results show that the alignment and depth of the electric current within the Earth's crust yields significant differences for the calculated surface magnetic field time-waveforms and spectra. Further, it is found that EM wave phenomena measured at the Earth's surface due to electric currents buried in the Earth's crust will only have significant spectra below - 1 Hz. |
Type |
Text |
Publisher |
Institute of Electrical and Electronics Engineers (IEEE) |
Volume |
56 |
Issue |
1 |
First Page |
199 |
Last Page |
203 |
Dissertation Institution |
University of Utah |
Language |
eng |
Bibliographic Citation |
Simpson, J. J. (2008). Global FDTD maxwell's equations modeling of elctromagnetic propagation from currents in the lithosphere. IEEE Transactions on Antennas and Propagation, 56(1), 199-203. |
Rights Management |
(c) 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. |
Format Medium |
application/pdf |
Format Extent |
366,391 bytes |
Identifier |
uspace,17727 |
ARK |
ark:/87278/s61c2fn8 |
Setname |
ir_uspace |
ID |
708089 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s61c2fn8 |