Weon, B. M.Je, J. H.Gremaud, G.2011-12-162011-12-162011-12-16201010.1107/S0909049510035363https://infoscience.epfl.ch/handle/20.500.14299/75026WOS:000283599600017Synchrotron phase-contrast hard X-ray imaging is used to provide highly efficient direct visualization of landslide dynamics and granular flows in fully wet granular piles. High penetration capability and phase-contrast enhancement of hard X-rays offer marked advantages in the precise tracking of individual granular movements through a thick water medium. It is revealed that the stress accumulation follows a power-law evolution while the relaxation follows an exponential one. The onset of landslide emerges at the trade-off of the two evolutions.hard X-rayslandslidesreal-time imaginggranular displacementsSelf-Organized CriticalityWet Granular PileSynchrotron-RadiationStabilityPhysicsDynamicsMatterFlowsAngleSandtext::journal::journal article::research article