Time-Domain Modeling of Three-Dimensional Earth's and Planetary Electromagnetic Induction Effect in Ground and Satellite Observations

Abstract

Electric currents induced in conductive planetary interiors by time-varying magnetospheric and ionospheric current systems have a significant effect on electromagnetic (EM) field observations. Complete characterization of EM induction effects is difficult owing to non-linear interactions between the three-dimensional (3-D) electrical structure of a planet and spatial complexity of inducing current systems. We present a general framework for time-domain modeling of 3-D EM induction effects in heterogeneous conducting planets. Our approach does not assume that the magnetic field is potential, allows for an arbitrary distribution of electrical conductivity within a planet, and can deal with spatially complex time-varying current systems. The method is applicable to both data measured at stationary observation sites and satellite platforms, and enables the calculation of 3-D EM induction effects in near real-time settings.

Cited by in corpus (6)

• The CHAOS-7 geomagnetic field model and observed changes in the South Atlantic Anomaly
• Interior heating of rocky exoplanets from stellar flares with application to TRAPPIST-1
• Polar ionospheric currents and high temporal resolution geomagnetic field models
• Magnetic signals from oceanic tides: new satellite observations and applications
• A decade of the fast-varying ionospheric and magnetospheric magnetic fields from ground and multi-satellite observations
• Satellite monitoring of long period ocean-induced magnetic field variations