Quantifying solar flux and geomagnetic main field influence on the equatorial ionospheric current system at the geomagnetic observatory Huancayo

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dc.contributor.authorMatzka, Jürgen
dc.contributor.authorSiddiqui, Tarique A.
dc.contributor.authorLilienkamp, Henning
dc.contributor.authorStolle, Claudia
dc.contributor.authorVeliz, Oscar
dc.date.accessioned2018-08-06T16:26:49Z
dc.date.available2018-08-06T16:26:49Z
dc.date.issued2017-10
dc.description.abstractIn order to analyse the sensitivity of the equatorial ionospheric current system, i.e. the solar quiet current system and the equatorial electrojet, to solar cycle variations and to the secular variation of the geomagnetic main field, we have analysed 51 years (1935–1985) of geomagnetic observatory data from Huancayo, Peru. This period is ideal to analyse the influence of the main field strength on the amplitude of the quiet daily variation, since the main field decreases significantly from 1935 to 1985, while the distance of the magnetic equator to the observatory remains stable. To this end, we digitised some 19 years of hourly mean values of the horizontal component (H), which have not been available digitally at the World Data Centres. Then, the sensitivity of the amplitude ΔH of the quiet daily variation to both solar cycle variations (in terms of sunspot numbers and solar flux F10.7) and changes of the geomagnetic main field strength (due to secular variation) was determined. We confirm an increase of ΔH for the decreasing main field in this period, as expected from physics based models (Cnossen, 2016), but with a somewhat smaller rate of 4.4% (5.8% considering one standard error) compared with 6.9% predicted by the physics based model.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationMatzka, J., Siddiqui, T. A., Lilienkamp, H., Stolle, C., & Veliz, O. (2017). Quantifying solar flux and geomagnetic main field influence on the equatorial ionospheric current system at the geomagnetic observatory Huancayo.==$Journal of Atmospheric and Solar-Terrestrial Physics, 163,$==120-125. https://doi.org/10.1016/j.jastp.2017.04.014es_ES
dc.identifier.doihttps://doi.org/10.1016/j.jastp.2017.04.014es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Atmospheric and Solar-Terrestrial Physicses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2265
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.ispartofurn:issn:1364-6826
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_ES
dc.subjectMagnetic fieldes_ES
dc.subjectEquatorial ionospherees_ES
dc.subjectGeomagnetic secular variationes_ES
dc.subjectSolar cyclees_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.titleQuantifying solar flux and geomagnetic main field influence on the equatorial ionospheric current system at the geomagnetic observatory Huancayoes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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