From obs: "On our way up the summer trail route to Hyalite Peak our party of three remotely triggered a small avalanche from the skin track at around 9,600ft on a east facing aspect. The storm slab went about 4 inches deep and 150-200ft across a small roll over feature. We were about 150ft away when we triggered the slide."
Number of slides
Soft slab avalanche
r-A remote avalanche released by the indicated trigger
I - Interface between new and old snow
Slab Thickness units
Single / Multiple / Red Flag