Studying hypothetical electromagnetic earthquake precursors using a global finite-difference time-domain model

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Publication Type honors thesis
School or College College of Engineering
Department Electrical Engineering
Faculty Mentor Jamesina Simpson
Creator Clark, Calli
Title Studying hypothetical electromagnetic earthquake precursors using a global finite-difference time-domain model
Year graduated 2016
Date 2016-04
Description Electromagnetic (EM) precursors may be detectable by satellites and ground-based stations before large earthquakes strike and destroy entire cities. However, earthquakes are near impossible to predict as the physics of earthquake precursors is still poorly understood. This paper reports a global finite-difference time-domain (FDTD) model to compute Maxwell's equations within the Earth-ionosphere cavity to better understand hypothetical earthquake precursors. A latitude-longitude space lattice accounts for the Earth's curvature, conductivity, and periodic boundary conditions for accurate extremely low frequency (ELF) and ultra-low frequency (ULF) wave propagation. Electric current excitations simulate a proposed earthquake precursor near the hypocenter of a 7.0 magnitude earthquake in Haiti in 2010. The resulting surface agneticfield demonstrates how current pulses diffuse through the Earth's lithosphere and reverberate in the ionosphere. The results can be further compared and correlated to ELF/ULF perturbations observed before earthquakes by satellites and ground-based stations.
Type Text
Publisher University of Utah
Subject earthquake prediction - Research; Seismology - Research; Earthquake hazard analysis; Earthquake precursors; Electromagnetic signals; Ionospheric physics; Finite-difference time-domain model
Language eng
Rights Management (c) Calli Clark
Format Medium application/pdf
Format Extent 25,093 bytes
Identifier honors/id/3
Permissions Reference URL https://collections.lib.utah.edu/details?id=1251664
ARK ark:/87278/s66h7sn7
Setname ir_htoa
Date Created 2016-06-27
Date Modified 2018-10-29
ID 205655
Reference URL https://collections.lib.utah.edu/ark:/87278/s66h7sn7
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