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Longitudinal variations of very‐low‐frequency chorus activity in the magnetosphere: Evidence of excitation by electrical power transmission lines
Author(s) -
Luette J. P.,
Park C. G.,
Helliwell R. A.
Publication year - 1977
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/gl004i007p00275
Subject(s) - magnetosphere , chorus , ionosphere , physics , earth's magnetic field , geophysics , harmonics , cyclotron , field line , electron precipitation , geomagnetic storm , extremely low frequency , plasmasphere , very low frequency , electron , magnetic field , plasma , astronomy , nuclear physics , voltage , art , literature , quantum mechanics
Very‐low‐frequency (VLF) chorus activity detected by the Ogo 3 satellite has the highest probability of occurrence in regions threaded by geomagnetic field lines that intersect industrialized areas. Interpretation of these results is based on radiated power line harmonics that leak into the magnetosphere and stimulate the recorded emissions through cyclotron interaction with trapped energetic electrons. These results emphasize the need for a careful evaluation of the effects of man‐made VLF noise on the ionosphere and magnetosphere.