Observation of non-Gaussianity and phase synchronization in intermittent magnetic field turbulence in the solar-terrestrial environment

Abstract

Abstract. We apply two nonlinear techniques, kurtosis and phase coherence index, to analyze magnetic field measurements from SOHO MDI solar images, ACE and Cluster data in the solar wind, and ground magnetometers in Brazil. We focus on two events: a non-ICME event in February 2002 and an ICME event in January 2005. Finite degree of non-Gaussianity and phase synchronization are observed in all datasets. The nonlinear response of the Earth's geomagnetic field to an ICME event in the solar wind is discussed.

Fluctuation analysis of solar radio bursts associated with geoeffective X-class flares

“…In the particular scenario of decimetric solar bursts, inhomogeneous plasma turbulence is possibly associated to the coronal plasma configuration where the radio burst is generated. It has been shown that when a X-class flare occurs, and there is a CME structurally associated, the interplanetary magnetic field turbulence downstream of the interplanetary CME shock is closely correlated with the geomagnetic turbulence (Sun et al, 2002;Miranda et al, 2009). Possibly, such interconnected event occurrence is due to the solar-terrestrial magnetic field coupling and to the intrinsic long-range correlation of the magnetic filament turbulence.…”