Perturbazioni geomagnetiche, aurorali, ionosferiche e dei raggi cosmici : interdipendenze e relazioni con l'attività solare

Abstract

Existence of interplanetary magnetic fields other than<br />the geomagnetic field is now well established. They travel as frozen-in<br />fields inside the solar plasma clouds: magnetic fields on the Sun are then<br />discussed. Furtherly radioemission phenomena are considered from the<br />viewpoint of their association and correlation with the interplanetary magnetic<br />field and solar plasma phenomena.<br />Morphology and geographical distribution of Polar Cap Absorption<br />events and their correlations with solar phenomena are reviewed.<br />At last experimental results on solar protons events are discussed