This avalanche seems like it was triggered either last night or this morning, the debris was fresh and it had no new snow on the bed surface. Appears to be triggered by a natural cornice drop, triggering a wind slab when it hit the slope. From what I could see of the crown looked to be new snow only, about 150ft wide and ran to the flats at the bottom, the part of the crown that was not destroyed by the cornice fall was around a foot deep. The cornice drop was a big one maybe the size of a train car.