Mostrar el registro sencillo del ítem Chakrabarty, D. Hui, Debrup Rout, Diptiranjan Sekar, R. Bhattacharyya, Archana Reeves, G. D. Ruohoniemi, J. M. 2018-11-21T15:33:16Z 2018-11-21T15:33:16Z 2017-02-04
dc.identifier.citation Chakrabarty, D., Hui, D., Rout, D., Sekar, R., Bhattacharyya, A., Reeves, G. D., & Ruohoniemi, J. M. (2017). Role of IMF By in the prompt electric field disturbances over equatorial ionosphere during a space weather event.==$Journal of Geophysical Research: Space Physics, 122$==(2), 2574-2588. es_ES
dc.description.abstract On 7 January 2005 (Ap=40) prompt penetration electric field perturbations of opposite polarities were observed over Thumba and Jicamarca on a few occasions during 13:45–16:30 UT. However, the electric field was found to be eastward during 14:45–15:30 UT over both Thumba and Jicamarca contrary to the general expectation wherein opposite polarities are expected at nearly antipodal points. On closer scrutiny, three important observational features are noticed during 14:10–15:15 UT. First, during 14:10–14:45 UT, despite increasing southward interplanetary magnetic field (IMF) Bz condition, the already westward electric field over Thumba weakened (less westward) while the eastward electric field over Jicamarca intensified (more eastward). Second, the electric field not only became anomalously eastward over Thumba but also got intensified further during 14:45–15:00 UT similar to Jicamarca. Third, during 15:00–15:15 UT, despite IMF Bz remaining steadily southward, the eastward electric field continued to intensify over Thumba but weakened over Jicamarca. It is suggested that the changes in IMF By component under southward IMF Bz condition are responsible for skewing the ionospheric equipotential patterns over the dip equator in such a way that Thumba came into the same DP2 cell as that of Jicamarca leading to anomalous electric field variations. Magnetic field measurements along the Indian and Jicamarca longitude sectors and changes in high‐latitude ionospheric convection patterns provide credence to this proposition. Thus, the present investigation shows that the variations in IMF By are fundamentally important to understand the prompt penetration effects over low latitudes. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher American Geophysical Union es_ES
dc.relation.ispartof urn:issn:2169-9380
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject IMF By es_ES
dc.subject Prompt penetration electric field es_ES
dc.subject Equatorial ionosphere es_ES
dc.subject DP2 es_ES
dc.title Role of IMF By in the prompt electric field disturbances over equatorial ionosphere during a space weather event es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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