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Classifying and bounding geomagnetic storms based on the SYM-H and ASY-H indices

Author

Listed:
  • Armando Collado-Villaverde

    (Universidad de Alcalá)

  • Pablo Muñoz

    (Universidad de Alcalá)

  • Consuelo Cid

    (Universidad de Alcalá)

Abstract

Geomagnetic storms, which are significant disturbances in Earth’s magnetic field, pose a natural hazard with potentially harmful effects on technological and electrical systems. Various indices such as Kp, Dst, and the newer SYM-H and ASY-H are used to measure storm intensity. However, there is no consensus among researchers regarding storm classification based on intensity and asymmetry for the SYM-H and ASY-H indices, as existing classifications mainly rely on the Dst and Kp indices. This study proposes a classification method based on the cumulative distribution function of the SYM-H and ASY-H indices, applying industry-wide percentiles to determine storm classes. Using percentiles and a superposed epoch analysis, storms are objectively classified based on intensity and occurrence probability. This classification approach has applications in storm forecasting and risk assessment.

Suggested Citation

  • Armando Collado-Villaverde & Pablo Muñoz & Consuelo Cid, 2024. "Classifying and bounding geomagnetic storms based on the SYM-H and ASY-H indices," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 120(2), pages 1141-1162, January.
    • Handle: RePEc:spr:nathaz:v:120:y:2024:i:2:d:10.1007_s11069-023-06241-1
    DOI: 10.1007/s11069-023-06241-1
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