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dc.contributor.author Fejer, B. G.
dc.contributor.author Jensen, J. W.
dc.contributor.author Kikuchi, T.
dc.contributor.author Chau, J. L.
dc.contributor.author Abdu, M. A.
dc.date.accessioned 2018-07-17T16:26:02Z
dc.date.available 2018-07-17T16:26:02Z
dc.date.issued 2007-10
dc.identifier.issn 2169-9402
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/1908
dc.description En: Journal of Geophysical Research: Space Physics v. 112, n. A10 (October 2007), p. A10304, 1-11.
dc.description.abstract "We use radar measurements from the Jicamarca Radio Observatory, magnetometer observations from the Pacific sector and ionosonde data from Brazil to study equatorial ionospheric electric fields during the November 2004 geomagnetic storm. Our data show very large eastward and westward daytime electrojet current perturbations with lifetimes of about an hour (indicative of undershielding and overshielding prompt penetration electric fields) in the Pacific equatorial region during the November 7 main phase of the storm, when the southward IMF, the solar wind and reconnection electric fields, and the polar cap potential drops had very large and nearly steady values. This result is inconsistent with the recent suggestion that solar wind electric fields penetrate without attenuation into the equatorial ionosphere for several hours during storm main phase. The largest daytime prompt penetration electric fields (about 3 mV/m) ever observed over Jicamarca occurred during the November 9 storm main phase, when large equatorial electrojet current and drift perturbations were also present in the Pacific and Brazilian equatorial regions. The rise and decay times of these equatorial electric fields were about 20 min longer than of the corresponding solar wind electric fields. The ratios of prompt penetration electric fields and corresponding solar wind electric field changes were highly variable even during the day, and had largest values near dawn. Also, the prompt penetration electric fields did not show polar cap potential drop saturation effects. Our results clearly highlight that the relationships of prompt penetration and solar wind electric fields, and polar cap potentials are far more complex than implied by simple proportionality factors." es_ES
dc.format application/pdf es_ES
dc.language.iso en_US es_ES
dc.publisher Instituto Geofísico del Perú es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Radar--Perú--Mediciones es_ES
dc.subject Campos eléctricos es_ES
dc.subject Tormentas magnéticas es_ES
dc.subject Ionósfera--Investigación--Perú es_ES
dc.title Equatorial ionospheric electric fields during the November 2004 magnetic storm es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Perú es_ES
dc.subject.ocde Medición es_ES
dc.subject.ocde Atmósfera es_ES
dc.subject.ocde Tormentas es_ES
dc.subject.ocde Física es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1029/2007JA012376 es_ES

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