During our Advanced Avalanche Workshop, my group was walking along the ridge looking into Snake Creek for any natural avalanche activity that might have occurred earlier in the morning. We triggered a cornice fall from a distance unintentionally which triggered a new snow soft slab below the cornice. Visibility was poor but I was watching the runout zone where I spotted a powder cloud. I would not swear it wasn't just wind drifting the heavy snowfall that was occurring but I suspect it was from the avalanche we triggered.