Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica
The paper discusses on the variations of the atmospheric vertical electric field measured at sub-auroral station Maitri (70◦75 S, 11◦75 E), and polar station Vostok (78.5◦S, 107◦E) during the geomagnetic disturbances on 25–26 January 2006. Diurnal variation of surface electric field measured at Mait...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | http://14.139.123.141:8080/jspui/handle/123456789/998 |
id |
ftindinstgeomagn:oai:localhost:123456789/998 |
---|---|
record_format |
openpolar |
spelling |
ftindinstgeomagn:oai:localhost:123456789/998 2023-05-15T14:04:08+02:00 Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica Victor, N. Jeni Panneerselvam, C. Kumar, C.P. Anil 2015 http://14.139.123.141:8080/jspui/handle/123456789/998 en eng Atmospheric electric field Magnetic storm Magnetosphere Ionosphere Global electric circuit Article 2015 ftindinstgeomagn 2019-11-26T08:39:32Z The paper discusses on the variations of the atmospheric vertical electric field measured at sub-auroral station Maitri (70◦75 S, 11◦75 E), and polar station Vostok (78.5◦S, 107◦E) during the geomagnetic disturbances on 25–26 January 2006. Diurnal variation of surface electric field measured at Maitri shows a similar variation with worldwide thunderstorm activity, whereas the departure of the field is observed during disturbed periods. This part of the field corresponds to the magnetospheric/ionospheric (an additional generator in the polar regions) voltage generators. Solar wind parameters and planetary indices represent the temporal variation of the disturbances, and digital fluxgate magnetometer variation continuously monitored to trace the auroral movement at Maitri. We have observed that the electrojet movement leaves its signature on vertical and horizontal components of the DFM in addition; the study infers the position of auroral current wedge with respect to Maitri. To exhibit the auroral oval, OVATION model is obtained with the aid of DMSP satellite and UV measurements. It is noted that the Maitri is almost within the auroral oval during the periods of disturbances. To examine the simultaneous changes in the vertical electric field associated with this magnetic disturbance, the dawn–dusk potential is studied for every UT hours; the potential was obtained from Weimer model and SuperDARN radar. The comparison reveals the plausible situation for the superposition of dawn–dusk potential on surface electric field over Maitri. This observation also shows that the superposition may not be consistent with the phase of the electrojet. Comparison of surface electric field at Maitri and Vostok shows that the parallel variation exhibits with each other, but during the period of geomagnetic disturbances, the influence is not much discerned at Vostok. Article in Journal/Newspaper Antarc* Antarctica Indian Institute of Geomagnetism (IIG): Repository Maitri ENVELOPE(11.733,11.733,-70.764,-70.764) |
institution |
Open Polar |
collection |
Indian Institute of Geomagnetism (IIG): Repository |
op_collection_id |
ftindinstgeomagn |
language |
English |
topic |
Atmospheric electric field Magnetic storm Magnetosphere Ionosphere Global electric circuit |
spellingShingle |
Atmospheric electric field Magnetic storm Magnetosphere Ionosphere Global electric circuit Victor, N. Jeni Panneerselvam, C. Kumar, C.P. Anil Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
topic_facet |
Atmospheric electric field Magnetic storm Magnetosphere Ionosphere Global electric circuit |
description |
The paper discusses on the variations of the atmospheric vertical electric field measured at sub-auroral station Maitri (70◦75 S, 11◦75 E), and polar station Vostok (78.5◦S, 107◦E) during the geomagnetic disturbances on 25–26 January 2006. Diurnal variation of surface electric field measured at Maitri shows a similar variation with worldwide thunderstorm activity, whereas the departure of the field is observed during disturbed periods. This part of the field corresponds to the magnetospheric/ionospheric (an additional generator in the polar regions) voltage generators. Solar wind parameters and planetary indices represent the temporal variation of the disturbances, and digital fluxgate magnetometer variation continuously monitored to trace the auroral movement at Maitri. We have observed that the electrojet movement leaves its signature on vertical and horizontal components of the DFM in addition; the study infers the position of auroral current wedge with respect to Maitri. To exhibit the auroral oval, OVATION model is obtained with the aid of DMSP satellite and UV measurements. It is noted that the Maitri is almost within the auroral oval during the periods of disturbances. To examine the simultaneous changes in the vertical electric field associated with this magnetic disturbance, the dawn–dusk potential is studied for every UT hours; the potential was obtained from Weimer model and SuperDARN radar. The comparison reveals the plausible situation for the superposition of dawn–dusk potential on surface electric field over Maitri. This observation also shows that the superposition may not be consistent with the phase of the electrojet. Comparison of surface electric field at Maitri and Vostok shows that the parallel variation exhibits with each other, but during the period of geomagnetic disturbances, the influence is not much discerned at Vostok. |
format |
Article in Journal/Newspaper |
author |
Victor, N. Jeni Panneerselvam, C. Kumar, C.P. Anil |
author_facet |
Victor, N. Jeni Panneerselvam, C. Kumar, C.P. Anil |
author_sort |
Victor, N. Jeni |
title |
Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
title_short |
Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
title_full |
Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
title_fullStr |
Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
title_full_unstemmed |
Variation of surface electric field during geomagnetic disturbed period at Maitri, Antarctica |
title_sort |
variation of surface electric field during geomagnetic disturbed period at maitri, antarctica |
publishDate |
2015 |
url |
http://14.139.123.141:8080/jspui/handle/123456789/998 |
long_lat |
ENVELOPE(11.733,11.733,-70.764,-70.764) |
geographic |
Maitri |
geographic_facet |
Maitri |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
_version_ |
1766275146588356608 |