Abnormal evening vertical plasma drift and effects on ESF and EIA over Brazil-South Atlantic sector during the 30 October 2003 superstorm

• Autores: Abdu, M. A., De Paula, E. R., Batista, I. S., Reinisch, B. W., Matsuoka, M. T., Camargo, P. O., Veliz, Oscar, Denardini, C. M., Sobral, J. H. A., Kherani, E. A., De Siqueira, P. M.
• Formato: artículo
• Fecha de Publicación: 2008
• Institución: Instituto Geofísico del Perú
• Repositorio: IGP-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.igp.gob.pe:20.500.12816/1511
• Enlace del recurso: http://hdl.handle.net/20.500.12816/1511; https://doi.org/10.1029/2007JA012844
• Nivel de acceso: acceso abierto
• Materia: Magnetic superstorm; Abnormal evening vertical drift; Large longitudinal difference; http://purl.org/pe-repo/ocde/ford#1.05.01

Equatorial F region vertical plasma drifts, spread F and anomaly responses, in the south American longitude sector during the superstorm of 30 October 2003, are analyzed using data from an array of instruments consisting of Digisondes, a VHF radar, GPS TEC and scintillation receivers in Brazil, and a Digisonde and a magnetometer in Jicamarca, Peru. Prompt penetrating eastward electric field of abnormally large intensity drove the F layer plasma up at a velocity 1200 ms−1 during post dusk hours in the eastern sector over Brazil. The equatorial anomaly was intensified and expanded poleward while the development of spread F/plasma bubble irregularities and GPS signal scintillations were weaker than their quiet time intensity. Significantly weaker F region response over Jicamarca presented a striking difference in the intensity of prompt penetration electric field between Peru and eastern longitudes of Brazil. The enhanced post dusk sector vertical drift over Brazil is attributed to electro-dynamics effects arising energetic particle precipitation in the South Atlantic Magnetic Anomaly (SAMA). These extraordinary results and their longitudinal differences are presented and discussed in this paper.