Two ski tracks lead into the crown. It was potentially triggered by one of the skiers, whose tracks exited at the bottom left side (looking up at the avalanche) of the bed surface. There were no visible tracks on the bed surface. The second set of ski tracks cut down across the crown then exit skier's right.
Avalanche failed on a thin layer of facets above a crust. Slab's hardness was fist to 4 fingers. It is possible that the same party remote triggered the other avalanche (D2) which broke near a rock band at