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Ann. Geophys., 24, 2735-2741, 2006
www.ann-geophys.net/24/2735/2006/
© European Geosciences Union 2006
On the scaling of waiting-time distributions of the negative IMF Bz component
R. D'Amicis1, R. Bruno1, B. Bavassano1, V. Carbone2, and L. Sorriso-Valvo3
1Istituto di Fisica dello Spazio Interplanetario (INAF), 00133 Roma, Italy
2Dipartimento di Fisica Università della Calabria, 87036 Rende (Cs), Italy
3Liquid Crystal Laboratory, INFM/CNR, 87030 Rende (Cs), Italy
Abstract. Statistics associated with the fluctuations in solar wind parameters show a
remarkable dependence on the solar activity phase.
In particular, we focus our attention on the waiting-time statistics
governing the MHD fluctuations of the z-component of the interplanetary
magnetic field, which are important within the framework of the Sun-Earth connections, and
briefly discuss the preliminary results.
Data from several spacecrafts, covering different phases of the solar cycle and
different radial distances, are used. We found that propagating Alfvénic
fluctuations and convected structures strongly influence the
statistics which vary from quasi-Poissonian to power law.
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