Dilation as a precursor in a continuous granular fault Victor Levy dit Vehel, Takahiro Hatano, Loïc Vanel, Knut Jørgen Måløy and Osvanny Ramos EPJ Web Conf., 249 (2021) 15006 Published online: 07 June 2021 DOI: 10.1051/epjconf/202124915006