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| Titel |
Surface electric field variations induced by intense geomagnetic storms of the solar cycle 23, a case study for the European geomagnetic observatory network |
| VerfasserIn |
Crisan Demetrescu, Venera Dobrica, Cristiana Stefan, Razvan Greculeasa |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250109171
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| Publikation (Nr.) |
 EGU/EGU2015-9054.pdf |
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| Zusammenfassung |
| We present a study of the surface electric field induced by 17 intense (Dst < -150 nT) geomagnetic storms, based on the analysis of the geomagnetic records from the European network of observatories. A comparative view of the results shows the following: (1) the more pronounced geoelectric component is directed East-West; (2) the amplitude difference is of the order of tens of mV/km in case of SUA – an observatory at 45° N, and of thousands of mV/km in case of NUR – an observatory at 60° N; (3) the sudden storm commencements are more pronounced at SUA latitude than at the NUR latitude and produce a significant variation of the electric field at SUA when compared with later storm variations. The amplitude differences reverse in case of NUR, where the effects of auroral currents dominate. |
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