From email: "Found this large slide just north or Imp today [10/25]. Right around 10k, N-NE aspect, crowns spanned estimated 800-1,000' and ranged from ~2-10' thick. Appeared to activate by both a weak layer near the ground and a mid-pack interface. Lower interface was pencil hard, variably icy melt freeze crust of some sort, with 10-20 cms of 2-3mm facets underneath. Didn't get a good handle on the mid-pack interface, mostly assumed its presence based on shallower crowns.
Also saw several other crowns, at similar and slightly lower elevations on similar aspects to the SW of above described slide. Other crowns appeared thinner and less wide."