*Valerie Cayol¹, Farshid Dabaghi², Yo Fukushima³, Marine Tridon¹, Delphine Smittarello⁴, Olivier Bodart², Jean-Luc Froger¹ (1.CNRS, UCA, LMV, OPGC, IRD, Clermont-Ferrand, France, 2.UdL, ICJ, Saint-Etienne, France, 3.IRIDeS, TU, Tohoku, Japan, 4.UGA, USMB, CNRS, IRD,IFSTTAR, ISTerre, Grenoble, France)