Key Issues Related to Solar Sources and Interplanetary Propagation of the April 2002 Events

A summary of the solar events such as coronal mass ejections (CMEs) and flares associated with the April 2002 storms will be provided. In particular events from the primary active region, AR9906 and the underlying magnetic configuration will be discussed. The connection of these CMEs to the interplanetary shocks and the solar energetic particles events will be explored. Based on the arrival times of the interplanetary CMEs and shocks, the evolution of these disturbances as they propagated between the Sun and Earth will be described. Finally, a comparison of the April 2002 events with other geoeffective events will be made.