EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Analysis of geomagnetically induced currents over the continental United States

Chigomezyo Ngwira1, Robert Arritt2, and Charles Perry2
Chigomezyo Ngwira et al.
  • 1Orion Space Solutions, Louisville, CO, United States
  • 2Electrical Power Research Institute, CA, United States

Human technology is vulnerable to space weather, a natural hazard. High-voltage electric power transmission grids constitute one of the most critical man-made technological systems vulnerable to space weather driven geomagnetically induced currents (GICs). In this study, we perform an analysis of (1) measured GIC data collected at mid-latitudes by U.S. power utilities during the period from 2010 to 2021, and (2) the corresponding geomagnetic field information for each event. The study includes a statistical analysis of all events and an overview of the top three highest GIC recordings in the data. We show that roughly 80% of the events are associated with the main phase of geomagnetic storms, while about 20% are associated with sudden storm commencement.

How to cite: Ngwira, C., Arritt, R., and Perry, C.: Analysis of geomagnetically induced currents over the continental United States, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-10912,, 2023.

Supplementary materials

Supplementary material file