Probing the large-amplitude flapping oscillations of current sheet with Cluster

Comparing a few different methods in case of multiple current sheet (CS) cross-ings without strong plasma sheet flows we confirmed a possibility to control the time variations of current sheet (CS) orientation and motion. Particularly, methods based on Minimal Variance Analysis show similar values and behavior of estimated CS normal with those based on B-gradient estimation and vertical translational CS velocity estimated from magnetic data of four spacecraft behaves similarly to ac-tual vertical plasma velocity. Flapping oscillations were the kink-like folds with the vertical amplitude about ∼ 1-2 Re, strong tilts in YZ plane and behavior deviating from that of simple harmonic wave.