Skier triggered avalanche. Remote trigger from ~100ft away. Crown ~400ft across, broke just below cornice on WNW ridge. Crown at ~30-31 degrees, with connected terrain below between 30-34. Ran ~800ft of vertical. Likely wind slab on top of faceted old snow. Entrained snow down to ground in upper slide area. No collapsing during tour. Some minor cracking with little propagation.
Additional natural avalanche activity seen on NNW ridge across from cornice break. Soft wind slab on top of weak layer.