Impulse Bursts of Geomagnetic Pulsations as the Ground Signature of Contact of Interplanetary Irregularity with the Dayside Magnetopause - Open Access Library Journal

OALibJ > Vol.3 No.3, March 2016

Impulse Bursts of Geomagnetic Pulsations as the Ground Signature of Contact of Interplanetary Irregularity with the Dayside Magnetopause ()

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DOI: 10.4236/oalib.1102493 950 Downloads 1,772 Views Citations

Author(s)

V. A. Parkhomov¹, B. A. Dovbnya², N. L. Borodkova³, A. V. Dmitriev^4,5, V. V. Safargaleyev⁶, A. Y. Pashinin⁷

Affiliation(s)

¹Baikal State University, Irkutsk, Russia.
²Geophysical Observatory Borok, Institute of Earth Physics RAS, Moscow, Russia.
³Institute of Space Research RAS, Moscow, Russia.
⁴Institute of Space Science, National Central University, Taoyuan.
⁵Skobeltsyn Institute of Nuclear Physics Moscow State University, Moscow, Russia.
⁶Polar Geophysical Institute, Apatity, Russia.
⁷Institute of Solar-Terrestrial Physics Sibirean Branch RAS, Irkutsk, Russia.

ABSTRACT

The aim of the present article was to analyze features of interactions between an interplanetary shock wave and the magnetosphere on the basis of comparative analysis of geomagnetic variations observed during a sudden commencement (SC) by satellites and ground-based stations with high time resolution. A case study of the interaction of an interplanetary shock wave (ISW) with the magnetosphere was carried out on April 23, 2012. Statistical analysis was based on 11 SC events occurring from 1988 to 2012. A precursor of SC in the form of a broadband electrо-magnetic pulse is detected globally in the frequency range of 0.2 to 6.5 Hz. The spectrum of pulses has a resonant structure. It is assumed that the structure results from a filtering effect of the ionosphere on MHD waves generated at the front of the ISW or in its interaction with the magnetopause.

KEYWORDS

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

Share and Cite:

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.

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