Rock magnetic property and paleointensity determination on historical Santorini lava flows - Spassov, Simo (Aristotle University of Thessaloniki. Department of Geophysics) ; Valet, Jean-Pierre (Institut de Physique du Globe de Paris) ; Kondopoulou, Despina (Aristotle University of Thessaloniki. Department of Geophysics) ; Zananiri, Irene (Institute of Geology and Mineral Exploration) ; Casas Duocastella, Lluís (Universitat Autònoma de Barcelona. Departament de Geologia) ; Le Goff, Maxime (Institut de Physique du Globe de Paris)