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<p>On 10 May 2024, a geomagnetic superstorm causing the largest geomagnetic disturbance since 2003 started because of the shock arrival at Earth from multiple coronal mass ejections at 17:05UT. In Greece, the magnetic disturbance was recorded by the Pedeli (PEG) magnetic observatory of the INTERMAGNET global network of observatories. At the same time, VAN telemetric network, installed in the 1980&#xa0;s and 1990&#xa0;s for earthquake prediction purposes, measured the electric field of the Earth at several field stations in Greece. Here, we report these measurements during this Mother’s Day or Gannon geomagnetic superstorm that lasted from 10 to 12 May 2024. We also show how the geoelectric data can be combined with the geomagnetic variations for an estimation of the resistivity at different locations in Greece. The present results are useful for the estimation of geomagnetically induced currents which constitute a major hazard for electric power networks.</p>

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Earth’s electric field in Greece during the 2024 Mother’s Day or Gannon geomagnetic superstorm

  • 期刊论文

  • 发表日期：

    2025年12月21日

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  • Efthimios S. Skordas,
  • Nicholas V. Sarlis,
  • Panayiotis A. Varotsos

摘要

On 10 May 2024, a geomagnetic superstorm causing the largest geomagnetic disturbance since 2003 started because of the shock arrival at Earth from multiple coronal mass ejections at 17:05UT. In Greece, the magnetic disturbance was recorded by the Pedeli (PEG) magnetic observatory of the INTERMAGNET global network of observatories. At the same time, VAN telemetric network, installed in the 1980 s and 1990 s for earthquake prediction purposes, measured the electric field of the Earth at several field stations in Greece. Here, we report these measurements during this Mother’s Day or Gannon geomagnetic superstorm that lasted from 10 to 12 May 2024. We also show how the geoelectric data can be combined with the geomagnetic variations for an estimation of the resistivity at different locations in Greece. The present results are useful for the estimation of geomagnetically induced currents which constitute a major hazard for electric power networks.