Field-aligned currents in the magnetosphere
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Resumen
Las corrientes alineadas con el campo en la magnetosfera fluyen en todas partes, no s6lo a altas 1"-titudes sino también a medianas y bajas. Sin embargo, su detecci6n con satcHites solo ha sido posible en la región por encima de las zonas aurorales. La existencia de estas corrientes a medianas y bajas latitudes se puede inferir de un análisis de los agnetogramas en tierra, en particular, a partir de la diferencia estacional en la variaci6n diurna del campo geomagnético. A latitudes medias, la componente dominante de las corrientes alineadas son las corrientes transecuatoriales del verano a invierno que combinan las regiones de focos de corrientes Sq en los hemisferios norte y sur. A bajas latitudes cerca del ecuador, la direcci6n de las corrientes alineadas con el campo es de verano a invierno en las horas anteriores al mediodía y de invierno a verano en las de la tarde.
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