Ioannis Kassaras¹, Vassilis Kapetanidis¹, Athanassios Ganas², Sotirios Valkaniotis³, Andreas Karakonstantis¹, Panayotis Papadimitriou¹, Vicki Kouskouna¹, Stylianos Chailas¹ and Andreas Tzanis¹, (1)National and Kapodistrian University of Athens, Geophysics - Geothermy, Athens, Greece, (2)National Observatory of Athens, Institute of Geodynamics, Athens, Greece, (3)Koronidos Str., Trikala, Greece