Geomagnetic Activity and Solar Cycle

The relationships with the sunspot cycle and solar origin of solar phenomena which contribute to geomagnetic activity are discussed. Shock event activity has a loose link, if any, with the sunspot number but a quite definite cycle behavior. The temporary expansion of polar wind streams generate the so-called recurrent geomagnetic activity just before a sunspot minimum. The remaining activity is related to the distribution around the Sun and to the time evolution of the densest coronal regions (coronal streamers and heliosheet) which are the sources, in the ecliptic plane, of the slow undisturbed wind of the quiet days, and of the low density areas in between which are the origin, in the ecliptic plane of the fluctuating wind activity.