Skier triggered slide on ledge

Snow was excellent. Classic coastal heavy-ish pow. One skier in our party triggered a small avalanche (1.5) on a steeper roll. Observed signs of recent small slides.

Skier triggered slab slide on NE facing aspect during a turn. Skier was able to ski out. No previous signs of instability on up track. Saw evidence of smaller (size 1) slides while skinning out of ledge basin.