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dc.contributor.authorTulasi Ram, S.en_US
dc.contributor.authorYokoyama, T.en_US
dc.contributor.authorOtsuka, Y.en_US
dc.contributor.authorShiokawa, K.en_US
dc.contributor.authorSripathi, S.en_US
dc.contributor.authorVeenadhari, B.en_US
dc.contributor.authorHeelis, Roderick A.en_US
dc.contributor.authorAjith, K. K.en_US
dc.contributor.authorGowtam, V. S.en_US
dc.contributor.authorGurubaran, S.en_US
dc.contributor.authorSupnithi, P.en_US
dc.contributor.authorLe Huy, M.en_US
dc.date.accessioned2016-09-23T20:57:32Z
dc.date.available2016-09-23T20:57:32Z
dc.date.created2016-01-11en_US
dc.date.issued2016-01-11en_US
dc.identifier.issn2169-9380en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5064
dc.description.abstractThe equatorial zonal electric field responses to prompt penetration of eastward convection electric fields (PPEF) were compared at closely spaced longitudinal intervals at dusk to premidnight sectors during the intense geomagnetic storm of 17 March 2015. At dusk sector (Indian longitudes), a rapid uplift of equatorial F layer to >550 km and development of intense equatorial plasma bubbles (EPBs) were observed. These EPBs were found to extend up to 27.13⁰N and 25.98⁰S magnetic dip latitudes indicating their altitude development to ~1670 km at apex. In contrast, at few degrees east in the premidnight sector (Thailand-Indonesian longitudes), no significant height rise and/or EPB activity has been observed. The eastward electric field perturbations due to PPEF are greatly dominated at dusk sector despite the existence of background westward ionospheric disturbance dynamo (IDD) fields, whereas they were mostly counter balanced by the IDD fields in the premidnight sector. In situ observations from SWARM-A and SWARM-C and Communication/Navigation Outage Forecasting System satellites detected a large plasma density depletion near Indian equatorial region due to large electrodynamic uplift of F layer to higher than satellite altitudes. Further, this large uplift is found to confine to a narrow longitudinal sector centered on sunset terminator. This study brings out the significantly enhanced equatorial zonal electric field in response to PPEF that is uniquely confined to dusk sector. The responsible mechanisms are discussed in terms of unique electrodynamic conditions prevailing at dusk sector in the presence of convection electric fields associated with the onset of a substorm under southward interplanetary magnetic field B_z.en_US
dc.description.sponsorshipGovernment of India (GITA/DST/TWN/P-47/2013; JSPS KAKENHI (grants 20244080, 5247080, and 15H05815)en_US
dc.language.isoenen_US
dc.publisherBlackwell Publishing Ltden_US
dc.relation.urihttp://dx.doi.org/10.1002/2015JA021932
dc.rights©2017 American Geophysical Union. All Rights Reserved.en_US
dc.sourceJournal of Geophysical Research A: Space Physics
dc.subjectGeomagnetismen_US
dc.subjectTerminators (Astronomy)en_US
dc.subjectElectric fieldsen_US
dc.subjectTropicsen_US
dc.titleDuskside Enhancement of Equatorial Zonal Electric Field Response to Convection Electric Fields During the St. Patrick's Day Storm on 17 March 2015en_US
dc.type.genreArticleen_US
dc.identifier.bibliographicCitationTulasi Ram, S., T. Yokoyama, Y. Otsuka, K. Shiokawa, et al. 2016. "Duskside enhancement of equatorial zonal electric field response to convection electric fields during the St. Patrick's Day storm on 17 March 2015." Journal of Geophysical Research A: Space Physics 121(1), doi:10.1002/2015JA021932en_US
dc.identifier.volume121en_US
dc.identifier.issue1en_US
dc.contributor.utdAuthorHeelis, Roderick A.en_US
dc.contributor.ISNI0000 0000 3175 0999 (Heelis, RA)


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