  Solar eruptions, known as Coronal Mass Ejections (CMEs), are frequently
observed on our Sun. Recent Kepler observations of superflares on G-type stars
have implied that so called super-CMEs, possessing kinetic energies 10 times of
the most powerful CME event ever observed on the Sun, could be produced with a
frequency of 1 event per 800-2000 yr on solar-like slowly rotating stars. We
have performed a 3D time-dependent global magnetohydrodynamic simulation of the
magnetic interaction of such a CME cloud with the Earth's magnetosphere. We
calculated the global structure of the perturbed magnetosphere and derive the
latitude of the open-closed magnetic field boundary. We also estimated energy
fluxes penetrating the Earth's ionosphere and discuss the consequences of
energetic particle fluxes on biological systems on early Earth.
