Meridional equatorial electrojet current in the American sector

Details Meridional equatorial electrojet current in the American sector Meridional equatorial electrojet current in the American sector

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999angeo..17..220r&link_type=abstract

Annales Geophysicae, vol. 17, Issue 2, pp.220-230

Physics

5

Scientific paper

Huancayo is the only equatorial electrojet station where the daytime increase of horizontal geomagnetic field (H) is associated with a simultaneous increase of eastward geomagnetic field (Y). It is shown that during the counter electrojet period when H is negative, Y also becomes negative. Thus, the diurnal variation of Y at equatorial latitudes is suggested to be a constituent part of the equatorial electrojet current system. Solar flares are known to increase the H field at an equatorial station during normal electrojet conditions (nej). At Huancayo, situated north of the magnetic equator, the solar flare effect, during nej, consists of positive impulses in H and Y and negative impulse in Z field. During counter electrojet periods (cej), a solar flare produces a negative impulse in H and Y and a positive impulse in Z at Huancayo. It is concluded that both the zonal and meridional components of the equatorial electrojet in American longitudes, as in Indian longitudes, flows in the same, E region of the ionosphere.

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