3421 20180118114656.0 POSTER-2018-0023 Lecocq, T. Short term real time relative velocity variations prior to the Piton de la Fournaise eruptions since June 2014 2017 2017-08-15 NO Ferrazzini, V. Boissier, P. IAVCEI 2017, Porland (USA) thomas.lecocq@observatoire.be CPOSTER