Auxiliary material for Autofluidization of pyroclastic flows propagating on rough substrates as revealed by laboratory experiments Corentin Chedeville, Olivier Roche (Clermont Université, Université Blaise Pascal, Laboratoire Magmas et Volcans, BP 10448, F63000 Clermont-Ferrand, France) CNRS, UMR 6524, LMV, F-63038 Clermont-Ferrand, France. IRD, R 163, LMV, F-63038 Clermont-Ferrand, France. Journal of Geophysical Research, Solid Earth, 2013 Introduction The data presented here are movies of some experimental flows presented in the paper. They were obtained between February and April 2012, thanks to a High speed video camera (FASTCAM Sa3) at a frequency of 60 frames/second. For each video, small grid in the background correspond to a lattice of 2x2 cm. 1. ms01.mov Video of an experimental flow of initially non-fluidized fine particles (0.08mm) propagating over a smooth substrate. 2. ms02.mov Video of an experimental flow of initially fluidized fine particles (0.08mm) propagating over a smooth substrate. 3. ms03.mov Video of an experimental flow of initially non-fluidized fine particles (0.08mm) propagating over a 3 mm rough substrate. 4. ms04.mov Video of an experimental flow of initially fluidized fine particles (0.08mm) propagating over a 3 mm rough substrate.