The Alfven Mach Number Control of the Solar Wind-Magnetosphere Coupling Efficiency and the Saturation of the Geomagnetic Indices

Minna Emilia Myllys, University of Helsinki, Helsinki, Finland, K Emilia J Kilpua, University of Helsinki, Department of Physics, Helsinki, Finland and Benoit Lavraud, Laboratoire d'astrophysique de Bordeaux, Pessac, France