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Theoretical effects of geomagnetic activity on low-latitude ionospheric electric fields
(American Geophysical Union, 2005-05-27)
The influence of geomagnetic activity on middle‐ and low‐latitude thermospheric winds and ionospheric electric fields is investigated using model results from the National Center for Atmospheric Research Thermosphere‐Ion ...
Trainees at fields, maize training activities at El Batan
(CIMMYT, 2019)
Homologous flares and magnetic field topology in active region NOAA 10501 on 20 November 2003
(Springer, 2011-03)
We present and interpret observations of two morphologically homologous flares
that occurred in active region (AR) NOAA 10501 on 20 November 2003. Both flares displayed four homologous Hα ribbons and were both accompanied ...
The 3D geometry of active region upflows deduced from their limb-to-limb evolution
(Springer, 2013-04)
We analyze the evolution of coronal plasma upflows from the edges of AR 10978, which has the best limb-to-limb data coverage with Hinode’s EUV Imaging Spectrometer (EIS). We find that the observed evolution is largely due ...
Solar cycle effects on the electric fields in the equatorial ionosphere
(American Geophysical Union, 1977-11-01)
The horizontal east‐west electric fields in the equatorial F region are estimated by using the vertical electron drift data over Jicamarca, Peru. The reversal of the electric field from west to east near the sunrise hours ...
Relating the interplanetary-induced electric fields with the low-latitude zonal electric fields under geomagnetically disturbed conditions
(American Geophysical Union, 2013-03-21)
The overall ionospheric variability with periods ranging from long-term, secular changes to days, hours, and even minutes and seconds, is influenced by the solar activity, geomagnetic activity, and processes originating ...