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Field line resonances associated with MHD waveguides in the magnetosphere
Author(s) -
Samson J. C.,
Harrold B. G.,
Ruohoniemi J. M.,
Greenwald R. A.,
Walker A. D. M.
Publication year - 1992
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 - 10.1029/92gl00116
Subject(s) - magnetosphere , physics , field line , magnetopause , magnetohydrodynamics , earth–ionosphere waveguide , dipole , computational physics , reflection (computer programming) , field (mathematics) , geophysics , quantum electrodynamics , plasma , ionosphere , nuclear physics , quantum mechanics , mathematics , pure mathematics , ionospheric absorption , computer science , programming language
The Johns Hopkins University/Applied Physics Laboratory HF radar at Goose Bay often sees F‐region drifts or electric fields which are associated with field line resonances in the Earth's magnetosphere. These resonances are seen in the interval from local midnight to morning, and have discrete, latitude‐dependent frequencies at approximately 1.3, 1.9, 2.6–2.7, and 3.2–3.4 mHz. We show that these frequencies are compatible with MHD waveguide modes, with antisunward propagation and reflection at the magnetopause and at turning points on dipolar field lines.