MAGNETOSPHERIC RESPONSE OF TWO TYPES IN PSC GEOMAGNETIC PULSATIONS TO INTERACTION WITH INTERPLANETARY SHOCK WAVESстатья

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Дата последнего поиска статьи во внешних источниках: 4 сентября 2019 г.

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[1] Magnetospheric response of two types in psc geomagnetic pulsations to interaction with interplanetary shock waves / V. A. Parkhomov, N. L. Borodkova, A. G. Yahnin et al. // Солнечно-земная физика. — 2018. — Vol. 4, no. 3. — P. 52–66. Using the June 22, 2015 event as an example, we present new data confirming the presence of a precursor of the sudden magnetic impulse caused by a powerful interplanetary shock wave (ISW). The precursor in the form of a train of oscillations (broadband pulse) with a falling frequency in the range 0.25÷11 Hz with a duration of ∼20 s, which had a spectral resonance structure, was recorded globally by a network of induction magnetometers at 18:33:27 UT. No significant phase delays of the signals were detected in four frequency bands at widely spaced observatories. It is suggested that the impulse can be excited in the Earth - ionosphere waveguide by a pulsed electric field which occurs in the ionosphere due to the short-term impact of ISW on the magnetosphere. [ DOI ]

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