AUTHOR=Gurchumelia Alexandre , Sorriso-Valvo Luca , Burgess David , Yordanova Emiliya , Elbakidze Khatuna , Kharshiladze Oleg , Kvaratskhelia Diana 

TITLE=Comparing Quasi-Parallel and Quasi-Perpendicular Configuration in the Terrestrial Magnetosheath: Multifractal Analysis

JOURNAL=Frontiers in Physics

VOLUME=Volume 10 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.903632

DOI=10.3389/fphy.2022.903632

ISSN=2296-424X

ABSTRACT=The terrestrial magnetosheath is a highly turbulent medium, with a high level of magnetic field fluctuations throughout a broad range of scales. These often include an inertial range where a magnetohydrodynamic turbulent cascade is observed. The multifractal properties of the turbulent cascade, strictly related to intermittency, are observed here during the transition from quasi-parallel to quasi-perpendicular magnetic field with respect to the bow-shock normal. 
A standard coarse-graining technique has been used to evaluate the generalized dimensions Dq and the corresponding multifractal spectrum f(α). A p-model fit provided a quantitative measure of multifractality and intermittency, to be compared with standard indicators: the width of the multifractal spectrum, the peak of the kurtosis, and its scaling exponent. Results show a clear transition and sharp differences in the intermittency properties for the two regions, with the quasi-parallel turbulence being more intermittent.