Decker Storm/wind slab

My partner and I observed shooting cracks and bailed off slope. Other party followed our track but proceeded. Triggered an avalanche above them which let go on a convexity on a North aspect. They pointed skis downhill and the slide debris piled up where they had been skiing. They proceeded through their debris and continued to ascend Decker on the same aspect. They skied the couloir on the North end of Decker (is it called Cleaver?) which is a very similar aspect. They ski cut it and the entire thing ripped, they descended on the smooth surface after the slide. We spoke to them after and they described the conditions as "very reactive". We observed one other small slide (presumed natural) on the same slide. Interestingly, there were numerous parties skiing the main faces of Decker which have sections of similar steepness but are just a few degrees NW of where we observed the slides. Two photos attached: 1 - Avalanche on North Face clearly shown. 2 - The couloir but picture quality prevents you from seeing the crown line.