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Fluctuations of the repetition period of Pc1 Pearl pulsations
Author(s) -
Guglielmi A.,
Feygin F.,
Mursula K.,
Kangas J.,
Pikkarainen T.,
Kalisher A.
Publication year - 1996
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 - 10.1029/96gl00965
Subject(s) - repetition (rhetorical device) , earth's magnetic field , period (music) , pearl , physics , linear correlation , mathematics , magnetic field , statistics , acoustics , geography , quantum mechanics , philosophy , linguistics , archaeology
In this paper we investigate fluctuations of the repetition period of geomagnetic Pc1 pearl pulsations. Starting from calculated repetition period we present a general formula for the deviation of the repetition period as a function of wave frequency and stochastic parameters of the medium along the ray trace. We then apply this formula for a dipole magnetic field with a simple plasma distribution, and show that a linear correlation between repetition period and its deviation is predicted. This correlation and the frequency dependence of fluctuations are then compared with experimental values measured from selected Pc1 pearl events observed in Finland.