Schumann resonance frequency variations during sudden ionospheric disturbances

Fluctuations of the fundamental and harmonic frequencies of the Schumann (earth-ionosphere cavity) resonances measured near Tromsø, Norway, on 28 March 1979 are examined on a timescale of ≲ 20 minutes. Their relationships with two sudden ionospheric disturbance events and one other geophysical event...

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Bibliographic Details
Published in:Journal of Atmospheric and Terrestrial Physics
Main Authors: Cannon, P.S., Rycroft, M.J.
Format: Article in Journal/Newspaper
Language:unknown
Published: Elsevier 1982
Subjects:
Online Access:http://nora.nerc.ac.uk/id/eprint/524315/
https://doi.org/10.1016/0021-9169(82)90124-6
Description
Summary:Fluctuations of the fundamental and harmonic frequencies of the Schumann (earth-ionosphere cavity) resonances measured near Tromsø, Norway, on 28 March 1979 are examined on a timescale of ≲ 20 minutes. Their relationships with two sudden ionospheric disturbance events and one other geophysical event is investigated. The experimentally observed frequency variations are, in some cases, at variance with the theoretical predictions of Madden and Thompson (1965).