  We investigate the geoeffective events happened from 8 to 20 Sept 2011,
analysing the most plausible solar sources of these events, where coronal mass
ejections and coronal holes play a fundamental role. The physical properties of
the coronal holes, such as area and magnetic field, are studied through the
Solar Dynamics Observatory instruments: AIA 193 {\AA} images and HMI
longitudinal magnetograms. The active regions which are the origin of the
coronal mass ejections are analysed in AIA and SoHO-LASCO data.
