Abstract

ARANCIBIA RIVEROS, K; STEPANOVA, M; BOSQUED, J. M.  and  ANTONOVA, E. E.. Study of the turbulence in the central plasma sheet during August 24-28 geomagnetic storm using the CLUSTER satellite data. Geofís. Intl [online]. 2008, vol.47, n.3, pp.265-271. ISSN 2954-436X.

We used the local Intermittency Measure Technique based on the wavelet transform to study plasma velocity fluctuations measured by CLUSTER II Ion Spectrometry experiment during August 24-28 geomagnetic storm. The results obtained showed a significant increase in the level of intermittent turbulence at the end of main phase. It can be related to a significant increase in the substorm activity, and stretching of the geomagnetic field lines observed during the main phase. This fact is important for understanding the nature of geomagnetic storms.

Keywords : Magnetosphere of the Earth; turbulence; geomagnetic storm; plasma sheet; eddy diffusion coefficient; intermittency.

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