Mapping Geoelectric Field Hazards in Ireland
Abstract Geoelectric fields are generated at the Earth's surface and can lead to the induction of hazardous geomagnetically induced currents (GIC) in infrastructure like power grids, railways and pipelines during geomagnetic storms. Magnitude and orientation of the geoelectric fields, in relati...
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| Format: | Article |
| Language: | English |
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Wiley
2024-02-01
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| Series: | Space Weather |
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| Online Access: | https://doi.org/10.1029/2023SW003638 |
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| author | John Malone‐Leigh Joan Campanyà Peter T. Gallagher Jim Hodgson Colin Hogg |
| author_facet | John Malone‐Leigh Joan Campanyà Peter T. Gallagher Jim Hodgson Colin Hogg |
| author_sort | John Malone‐Leigh |
| collection | DOAJ |
| description | Abstract Geoelectric fields are generated at the Earth's surface and can lead to the induction of hazardous geomagnetically induced currents (GIC) in infrastructure like power grids, railways and pipelines during geomagnetic storms. Magnitude and orientation of the geoelectric fields, in relation to the infrastructure, are key features needed to determine the intensity of GIC. Here, we developed the first geoelectric hazard map for the island of Ireland, with the aim of providing detailed information that can help stakeholders mitigate the impact of GICs. The hazard map was developed by modeling and mapping the geoelectric field across Ireland for 28 years (1991–2018) using magnetic field data with magnetotelluric transfer functions. The approach for developing the hazard map calculates the probability of exceeding a hazardous geoelectric field threshold (500 mV/km) during large geomagnetic storms, taking directionality and amplitude into account. We found hazardous geoelectric fields to be mostly localized in areas in the west, south‐west and northern coast. We observed that the geoelectric field have a stronger dominant orientation than the orientation of the geomagnetic field, often constraining the hazardous geoelectric field in particular directions only. We demonstrate a seasonal/diurnal effect is present in the geoelectric field time series. The impact of galvanic distortion was also assessed, and we demonstrate that there is a significant difference in terms of amplitude and direction between both models. |
| format | Article |
| id | doaj-art-5e52d1a28ce645bbb2a5d6c6e79ac39b |
| institution | Kabale University |
| issn | 1542-7390 |
| language | English |
| publishDate | 2024-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Space Weather |
| spelling | doaj-art-5e52d1a28ce645bbb2a5d6c6e79ac39b2025-01-14T16:30:41ZengWileySpace Weather1542-73902024-02-01222n/an/a10.1029/2023SW003638Mapping Geoelectric Field Hazards in IrelandJohn Malone‐Leigh0Joan Campanyà1Peter T. Gallagher2Jim Hodgson3Colin Hogg4Astrophysics Section DIAS Dunsink Observatory Dublin Institute for Advanced Studies Dublin IrelandGeological Survey Ireland Dublin IrelandAstrophysics Section DIAS Dunsink Observatory Dublin Institute for Advanced Studies Dublin IrelandGeological Survey Ireland Dublin IrelandGeophysics Section Dublin Institute for Advanced Studies Dublin IrelandAbstract Geoelectric fields are generated at the Earth's surface and can lead to the induction of hazardous geomagnetically induced currents (GIC) in infrastructure like power grids, railways and pipelines during geomagnetic storms. Magnitude and orientation of the geoelectric fields, in relation to the infrastructure, are key features needed to determine the intensity of GIC. Here, we developed the first geoelectric hazard map for the island of Ireland, with the aim of providing detailed information that can help stakeholders mitigate the impact of GICs. The hazard map was developed by modeling and mapping the geoelectric field across Ireland for 28 years (1991–2018) using magnetic field data with magnetotelluric transfer functions. The approach for developing the hazard map calculates the probability of exceeding a hazardous geoelectric field threshold (500 mV/km) during large geomagnetic storms, taking directionality and amplitude into account. We found hazardous geoelectric fields to be mostly localized in areas in the west, south‐west and northern coast. We observed that the geoelectric field have a stronger dominant orientation than the orientation of the geomagnetic field, often constraining the hazardous geoelectric field in particular directions only. We demonstrate a seasonal/diurnal effect is present in the geoelectric field time series. The impact of galvanic distortion was also assessed, and we demonstrate that there is a significant difference in terms of amplitude and direction between both models.https://doi.org/10.1029/2023SW003638hazard mappinggeoelectric fieldsmagnetotellurics |
| spellingShingle | John Malone‐Leigh Joan Campanyà Peter T. Gallagher Jim Hodgson Colin Hogg Mapping Geoelectric Field Hazards in Ireland Space Weather hazard mapping geoelectric fields magnetotellurics |
| title | Mapping Geoelectric Field Hazards in Ireland |
| title_full | Mapping Geoelectric Field Hazards in Ireland |
| title_fullStr | Mapping Geoelectric Field Hazards in Ireland |
| title_full_unstemmed | Mapping Geoelectric Field Hazards in Ireland |
| title_short | Mapping Geoelectric Field Hazards in Ireland |
| title_sort | mapping geoelectric field hazards in ireland |
| topic | hazard mapping geoelectric fields magnetotellurics |
| url | https://doi.org/10.1029/2023SW003638 |
| work_keys_str_mv | AT johnmaloneleigh mappinggeoelectricfieldhazardsinireland AT joancampanya mappinggeoelectricfieldhazardsinireland AT petertgallagher mappinggeoelectricfieldhazardsinireland AT jimhodgson mappinggeoelectricfieldhazardsinireland AT colinhogg mappinggeoelectricfieldhazardsinireland |