3009 20170106113047.0 OUTRTLK-2017-0002 Lefèvre, Laure 150 ans de tempêtes géomagnétiques 2016 2016-12-05 Talk based on the work realized in the context of the COMESEP project, and which led to the publication of two companion articles by Vennerstrom et al. and Lefèvre et al. COMESEP/ COMESEP/ COMESEP STCE geomagnetic storms extreme events sunspots active regions CCT ENV - Atelier "Evènements Solaires Extrêmes" laure.lefevre@observatoire.be OUTRTLK