Emigrant Gulch natural avalanche

Fresh snow had fallen the night of Jan 6th and through the morning on Jan 7th, about 4-6” of low density snow above 8000ft. No wind or recent drifting was observed. New snow from the past storm was 3-4ft deep, basically comprising the entire snowpack, the avalanche failed on a layer of depth hoar at the base of the snowpack.

As I made my way up toward emigrant peak I observed a very large natural avalanche that ripped out on a NE aspect at 9500ft. It propagated hundreds of feet wide and ran approximately 1500ft. The deepest part of the debris pile was ~15-20ft deep. The crown was approximately 3-5ft deep, maybe deeper. 

Observed several large collapses and whoomphing as I toured around the area. I observed at least 4 other natural avalanches in the area, not as big but still a tell tale sign to have cautious route finding and avoid slopes steeper than 30 degrees in this mountain range.