Open AccessMethodology for time‐domain estimation of storm time geoelectric fields using the 3‐D magnetotelluric response tensors
Author(s) -
Kelbert Anna,
Balch Christopher C.,
Pulkkinen Antti,
Egbert Gary D.,
Love Jeffrey J.,
Rigler E. Joshua,
Fujii Ikuko
Publication year - 2017
Publication title -
space weather
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.254
H-Index - 56
ISSN - 1542-7390
DOI - 10.1002/2017sw001594
Subject(s) - time domain , storm , magnetotellurics , context (archaeology) , geophysics , geology , geomagnetic storm , hazard , frequency domain , seismology , meteorology , magnetic field , computer science , engineering , earth's magnetic field , geography , electrical engineering , physics , electrical resistivity and conductivity , paleontology , oceanography , chemistry , organic chemistry , quantum mechanics , computer vision
Geoelectric fields at the Earth's surface caused by magnetic storms constitute a hazard to the operation of electric power grids and related infrastructure. The ability to estimate these geoelectric fields in close to real time and provide local predictions would better equip the industry to mitigate negative impacts on their operations. Here we report progress toward this goal: development of robust algorithms that convolve a magnetic storm time series with a frequency domain impedance for a realistic three‐dimensional (3‐D) Earth, to estimate the local, storm time geoelectric field. Both frequency domain and time domain approaches are presented and validated against storm time geoelectric field data measured in Japan. The methods are then compared in the context of a real‐time application.