Impulse Bursts of Geomagnetic Pulsations as the Ground Signature of Contact of Interplanetary Irregularity with the Dayside MagnetopauseReport as inadecuate




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The aim of the present article was to analyze features of interactionsbetween an interplanetary shock wave and the magnetosphere on the basis ofcomparative analysis of geomagnetic variations observed during a suddencommencement SC by satellites and ground-based stations with high timeresolution. A case study of the interaction of an interplanetary shock wave ISWwith the magnetosphere was carried out on April 23, 2012. Statistical analysiswas based on 11 SC events occurring from 1988 to 2012. A precursor of SC in theform of a broadband electrо-magnetic pulse is detected globally in the frequency range of 0.2 to6.5 Hz. The spectrum of pulses has a resonant structure. It is assumed that thestructure results from a filtering effect of the ionosphere on MHD waves generated at the front of the ISW or in itsinteraction with the magnetopause.

KEYWORDS

Precursor of Sudden Commencement, Broadband Electromagnetic Pulse, Interplanetary Shock Wave-Related Waves, Ionospheric Alfven Resonator

Cite this paper

Parkhomov, V. , Dovbnya, B. , Borodkova, N. , Dmitriev, A. , Safargaleyev, V. and Pashinin, A. 2016 Impulse Bursts of Geomagnetic Pulsations as the Ground Signature of Contact of Interplanetary Irregularity with the Dayside Magnetopause. Open Access Library Journal, 3, 1-13. doi: 10.4236-oalib.1102493.





Author: V. A. Parkhomov1, B. A. Dovbnya2, N. L. Borodkova3, A. V. Dmitriev4,5, V. V. Safargaleyev6, A. Y. Pashinin7

Source: http://www.scirp.org/



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