Collisionless Magnetohydrodynamic Turbulence in Two Dimensions

Collisionless magnetohydrodynamic (MHD) turbulence in two dimensions is discussed [1]. Effects of electron inertia and electron pressure are included. Vortex formation at scales of the order of ion gyro-radius is predicted and compared with recent \textit{in situ} European multi-satellite observations [2]. \newline \underline {References:} \newline [1] B.K.Shivamoggi : \textit{Ann. Phys}. \underline {315},1, (2005). \newline [2] D.Sundkvist et al.: \textit{Nature} \underline {436}, 825, (2005).