Reported by a person who followed this group.

A group of 8 people skied out-of-bounds from Snowbasin down Malans and Taylor Canyon. They triggered a very large avalanche 1.5' deep x 500 wide and ran 1600 vertical. Instead of descending the avalanche path, they skied an identical avalanche path next to it, which had not yet slide. He also noticed another avalanche lower in that canyon that may have been triggered sympathetically by the original avalanche or by the skiers.