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On large poleward‐directed electric fields at sub‐auroral latitudes
Author(s) -
Maynard N. C.
Publication year - 1978
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl005i007p00617
Subject(s) - midnight , latitude , geophysics , geology , convection , discontinuity (linguistics) , ionosphere , electric field , middle latitudes , equipotential , storm , atmospheric sciences , geomagnetic storm , meteorology , magnetic field , physics , geodesy , earth's magnetic field , astronomy , oceanography , mathematics , mathematical analysis , quantum mechanics
Intense poleward‐directed electric fields were observed by OGO‐6 in the pre‐magnetic midnight F‐region, close to the Harang discontinuity and at latitudes of less than 60° invariant. These results support the recent measurements of Smiddy et al. (1977). Both sets of data are consistent with a compression of equipotentials on the low latitude edge of the pre‐midnight convection cell, caused by an impediment of the sub‐storm‐related southwestward expansion of the convection pattern.