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A one-dimensional model of solid-earth electrical resistivity beneath Florida

November 19, 2015

An estimated one-dimensional layered model of electrical resistivity beneath Florida was developed from published geological and geophysical information. The resistivity of each layer is represented by plausible upper and lower bounds as well as a geometric mean resistivity. Corresponding impedance transfer functions, Schmucker-Weidelt transfer functions, apparent resistivity, and phase responses are calculated for inducing geomagnetic frequencies ranging from 10−5 to 100 hertz. The resulting one-dimensional model and response functions can be used to make general estimates of time-varying electric fields associated with geomagnetic storms such as might represent induction hazards for electric-power grid operation. The plausible upper- and lower-bound resistivity structures show the uncertainty, giving a wide range of plausible time-varying electric fields.

Citation Information

Publication Year 2015
Title A one-dimensional model of solid-earth electrical resistivity beneath Florida
DOI 10.3133/ofr20151185
Authors Cletus Blum, Jeffrey J. Love, Kolby Pedrie, Paul A. Bedrosian, E. Joshua Rigler
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Open-File Report
Series Number 2015-1185
Index ID ofr20151185
Record Source USGS Publications Warehouse
USGS Organization Geologic Hazards Science Center

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