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Synthesizing ground magnetic disturbance using dipole-aligned loop elementary currents and Biot-Savart relationship

March 28, 2022

This report presents a method for constructing a simplified numerical description of the electric current distributions in the ionosphere and gap region based on dipole-aligned loop elementary currents (DALECs). A theoretical basis for DALECs is presented, along with a prototypical algorithm for constructing an elementary numerical DALEC. The algorithm is verified and validated by combining DALECs with an efficient Biot-Savart solver in order to estimate magnetic disturbance on the Earth’s surface. We examine (1) simple scenarios with known solutions and (2) hemispherical magnetic disturbance fields obtained from a state-of-the-art global geospace circulation model.

Citation Information

Publication Year 2022
Title Synthesizing ground magnetic disturbance using dipole-aligned loop elementary currents and Biot-Savart relationship
DOI 10.3133/sir20215123
Authors E. Joshua Rigler, Michael Wiltberger
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Scientific Investigations Report
Series Number 2021-5123
Index ID sir20215123
Record Source USGS Publications Warehouse
USGS Organization Geologic Hazards Science Center