Burst regimes of long-period irregular pulsations at frequencies of 2.0-6.0 mHz and substorm activity in the nightside magnetosphere

Details Burst regimes of long-period irregular pulsations at frequencies of 2.0-6.0 mHz and substorm activity in the nightside magnetosphere Burst regimes of long-period irregular pulsations at frequencies of 2.0-6.0 mHz and substorm activity in the nightside magnetosphere

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ge%26ae..49..461k&link_type=abstract

Geomagnetism and Aeronomy, Volume 49, Issue 4, pp.461-470

Mathematics

Logic

94.30.Ms, Magnetic Pulsations

Scientific paper

The results of studying the simultaneous observations of burst regimes of long-period irregular pulsations at frequencies of 2.0-6.0 mHz (the series of ipcl bursts) in the region of the dayside polar cusp and magnetic field disturbances in the nightside auroral oval are presented. The data on the magnetic field at Mirny (MIR, Φ = 76.93°; Λ = 122.92°) and Yellowknife (YKC, Φ = 69.94°; Λ = 294.38°) antipodal observatories as well as the AE index values ( http://www.cetp.ipsl.fr/~isgi/homepag1.htm ) have been used in an analysis. It has been found out that 87% (group I) and 13% (group II) of events were registered against a back-ground of substorm activity and a quiet nightside magnetosphere, respectively. It has been revealed that several morphological characteristics of the group-I and -II ipcl bursts differ depending on the conditions in the nightside magnetosphere. It has been indicated that the intervals between peaks and the amplitudes of ipcl bursts of both types are distributed according to the exponential and power laws. The results indicate that magnetospheric plasma turbulence develops in the region where burst regimes are formed. It is assumed that the substorm processes in the magnetotail manifest themselves in plasma turbulence in the dayside cusp.

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