In 1993 and 1997 the Lund group arranged a workshop on “AI Applications in Solar-Terrestrial Physics” and in 2003 a workshop on “Solar Activity: Exploration, Understanding and Prediction”.

As part of a research project funded by the Swedish Civil Contingencies Agency (MSB) this meeting was arranged. This is the first meeting in the sequence. The following questions were discussed: What observations are needed? How extreme can a solar storm become? How long is the build-up time? How to define an observable measure for an extreme solar storm? How can we warn and forecast them? How often do they occur?