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Geomagnetic disturbances and grid vulnerability: Correlating storm intensity with power system failures
Mauro González Figueroa1, Daniel David Herrera Acevedo1, David Sierra Porta2
1Escuela de Ingeniería, Arquitectura y Dise no, Universidad Tecnológica de Bolívar, Cartagena de Indias, Bolívar, Colombia.
Plos One
|July 28, 2025
Summary
Geomagnetic storms significantly increase unexplained power outages. Monitoring intense solar activity and space weather is crucial for improving power grid reliability and preventing disruptions.
Area of Science:
- Geophysics and Space Weather
- Electrical Engineering and Power Systems
Background:
- Geomagnetic storms pose a risk to modern power grid reliability.
- Understanding the link between space weather and power disruptions is vital.
Purpose of the Study:
- To investigate the correlation between geomagnetic storm activity and unexplained power outages in the U.S.
- To identify key space weather parameters influencing power system reliability.
Main Methods:
- Analyzed geomagnetic storm data (Dst index) and solar wind parameters (proton density, plasma speed, IMF) from 2006-2023.
- Utilized DOE OE-417 Annual Summaries for power outage data.
- Employed correlation analysis and regression modeling.
Main Results:
- Years with more frequent and intense geomagnetic storms showed higher rates of unexplained outages.
- Negative Dst values, high solar wind velocity, and alpha/proton ratios correlated with increased outages.
- Storm intensity and magnetic field strength were significant predictors of unexplained outages.
Conclusions:
- Geomagnetic storm intensity is a key factor in unexplained power interruptions.
- Monitoring space weather is essential for enhancing power grid resilience.
- Improved outage reporting and attention to space weather impacts are recommended.
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