IRREGULAR GEOMAGNETIC DISTURBANCES EMBEDDED INTO SUBSTORMS AS A CAUSE OF INDUCED CURRENTS IN ELECTRIC POWER LINES
Influence of impulsive magnetosphere disturbances such irregular Pi3 pulsations embedded into substorms on geomagnetically induced currents (GIC) has been considered for the geomagnetic storm 27-29 June 2013. GIC were registered in electric power lines of Kola Peninsula and Karelia by the system of...
| Main Authors: | , , , |
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| Format: | Conference Object |
| Language: | English |
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Кольский научный центр Российской академии наук
2018
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.25702/ksc.2588-0039.2018.41.26-29 http://pgia.ru/seminar/archive/2018/Proceedings_2018.pdf#page=27 |
| Summary: | Influence of impulsive magnetosphere disturbances such irregular Pi3 pulsations embedded into substorms on geomagnetically induced currents (GIC) has been considered for the geomagnetic storm 27-29 June 2013. GIC were registered in electric power lines of Kola Peninsula and Karelia by the system of Polar Geophysical Institute and Kola Scientific Center. Geomagnetic field variability was examined using data from the IMAGE magnetometer array. We have confirmed that during the considered impulsive events the ionospheric currents fluctuate in both the East-West and North-South directions, and they do induce GIC in latitudinally extended electric power line. Contrary to classic point of view it is found for some events that noticeable GIC can better correlate with geomagnetic field variations B than with its derivate dB/dt. A relative contribution into GIC variations by temporal variations of the geomagnetic field and by spatial variations of the vortex-like ionosphere current structures has been examined. |
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