Nonlinear character of ion cyclotron waves (Pc1 pulsations) with a spreading dynamical spectrum

Feygin, F. Z.; Клейменова, Н. Г.; Khabazin, Yu. G.; Prikner, Karel

doi:10.1134/s0016793209030050

Cited by 3 publications

(1 citation statement)

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“…Experimental studies have shown that the ground-based Pc1 pulsations ("pearls") are observed on the form of the periodically successive Alfven wave packets with the predominantly left-hand wave polarization. These pulsations had been the subject of the intense research for many years (e.g., Matveeva and Troitskaya, 1965;Troitskaya and Guglielmi, 1969;Feygin and Yakimenko, 1969;Gendrin at al., 1971;Troitskaya et al, 1975;Kangas et al, 1998;Feygin et al, 2003;Mursula, 2007;Demekhov, 2007). The duration of the Pc1 series is usually from the half of an hour to the several hours.…”

Section: Introductionmentioning

confidence: 99%

Unusual Pc1 Geomagnetic Pulsations: Case study: 11 September 2017

Feygin¹,

Khabazin²,

Клейменова³

et al. 2019

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The results of the analysis of the structure and dynamics of unusual Pc1 geomagnetic pulsations, recorded at the Finnish pulsation magnetometer chain in the end of 24-th solar activity cycle, are presented. The discussed event was observed on 11 September 2017 in the late recovery phase of the severe magnetic storm that occurred on 7-8 September 2017. The storm recovery phase is typical time for the Pc1 pulsation generation. However, in course of this storm, only one Pc1 event was recorded with a very unusual complicated dynamic spectrum which was found to be similar at all five ground-based stations, spaced from 57 to 67° geomagnetic latitude. The Pc1 amplitude maximum has been observed at the lowest latitude station Nurmijarvi (NUR, L = 3.3). The theoretical interpretation of the behavior of this unusual of Pс 1 pulsation burst is presented.

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