Quiet solar geomagnetic variations at observatories in symmetrical latitudes during a minimum of solar activity

Autores

  • María Andrea Van Zele Consejo Nacional de Investigaciones Científicas y Técnicas.
  • Otto Otto Consejo Nacional de Investigaciones Científicas y Técnicas. Argentina, Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires

Palavras-chave:

geomagnetic variations, sun

Resumo

Solar geomagnetic variations on quiet days (Sq), neglecting the small lunar contribution (L), are compared for Teoloyucan (geogr.lal 19°45', long. -99° 11') and La Quiaca (geogr.lat -22°06', long.-65°36’), located in the longitudinal sector of maximum difference between geographic and geomagnetic latitudes, the latter being 29,6° and -10,6°respectively. Given the manifest asymmetry, even during the equinoxes comparable data from Pilar (geogr.lat-31°40', long.-63°53'; geomagn.lat-20,40) are supplied.
Noon values of the geomagnetic north component of Sq can be represented by a plane model including an electrojet centered al the dip equator and two ionospheric current systems of greater latitudinal extent Application of this model to the particular group of E-months (March/April-September/October) shows that the distance between the vortices of these current systems and the equator is greater in the northern hemisphere than in the southern. Merely geomagnetic causes cannot account for this discrepancy.

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Referências

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Matsushita S. and H. Maeda, 1965; On the geomagnetic solar quiet daily variation field during the IGY. Journal of Geophysical Research, 70(11); 315-338.

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Schneider O., 1979; Interacción de mareas; GEOACTA, 9 (1); 1-21. Servicio Meteorológico Nacional (Argentina); Tabulated hourly magnetic values for the year 1976, unpublished.

Universidad Autónoma de México, 1986; Observatorio magnético de Teoloyucan, Valores magnéticos para 1976.

Vecchi M. C., M. A. Van Zele y O. Schneider, 1985; Variaciones geomagnéticas solares de días tranquilos en territorio argentino según la actividad solar, GEOACTA, 12(2); 57-70.

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Publicado

1993-12-12

Como Citar

Van Zele, M. A., & Otto, O. (1993). Quiet solar geomagnetic variations at observatories in symmetrical latitudes during a minimum of solar activity. Geoacta, 20, 27–35. Recuperado de https://revistas.unlp.edu.ar/geoacta/article/view/13700

Edição

Seção

Trabalho científico