Title: Space Weather: a User's Perspective Isabelle Scholl International Space University, Strasbourg, France Abstract: In this talk, we will look at Space Weather through its solar causes, effects and impact on human life and technologies. We will also discuss users' applications and needs, and ongoing projects. As an illustration, we will present a scientific application to Space Weather: An event that was first observed first on Earth, and which was subsequently studied using a novel approach to trace its origin at the Sun.