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

Open-File Report 2015-1185
By: , and 

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Abstract

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.

Suggested Citation

Blum, Cletus, Love, J.J., Pedrie, Kolby, Bedrosian, P.A., and Rigler, E.J., 2015, A one-dimensional model of solid-Earth electrical resistivity beneath Florida: U.S. Geological Survey Open-File Report 2015–1185, 16 p., http://dx.doi.org/10.3133/ofr20151185.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Abstract
  • Introduction
  • Method Summary
  • Tectonic and Geologic Overview
  • Northern and Southern Layered-Earth Structures
  • Resistivity versus Depth
  • Transfer Functions
  • Discussion and Conclusions
  • Acknowledgments
  • References Cited
  • Appendix

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title A one-dimensional model of solid-earth electrical resistivity beneath Florida
Series title Open-File Report
Series number 2015-1185
DOI 10.3133/ofr20151185
Year Published 2015
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Geologic Hazards Science Center
Description iv, 16 p.
Country United States
State Florida
Online Only (Y/N) Y
Additional Online Files (Y/N) N