SS-ASr-D2-R1.5. The initial avalanche was a small windslab, triggered remotely by our party from the ridge. The initial slab was 2.5' deep and no more than 10' wide. It failed at the ground, entraining all available snow in the couloir. It triggered a larger avalanche (photo 2) on the apron below and ran full track. Both avalanches appear to have failed on the same layer of weak faceted grains at the base of the snowpack, demonstrating a capability for large, full-depth avalanches to be triggered remotely from a distance, and/or by smaller avalanches which may be more sensitive to human trigger.