after doing an ECT just below Cardiff Pass with a result of ECTNR my touring partner and I decided to push on for the south face of superior despite the poor visibility. after skiing down to roughly 10,500 feet I noticed a 10" crown roughly 40' wide. my partner and I skied the slide path to the end at roughly 10,000 and i was talking with him about our next possible island of safety when a soft slab from above knocked me off my feet but I was not carried. We proceeded to link up multiple (4+) other slide paths to pick our way down to the bottom. I'll definitely be saving the big runs for days where visibility is much better in the future and signs of avalanches can be spotted from further than 10' a way. Unfortunately I didn't take any pictures as the visibility was terrible and i really didn't want to hang around any longer than necessary.