Skier triggered avalanche in Beehive Basin

Beehive Basin
Northern Madison
Code
SS-ASu-R2-D2-I
Elevation
9000
Aspect
NE
Aspect Range
ENE
Latitude
45.34220
Longitude
-111.39700
Notes

From an email:

"Dug a pit at ~9000’ on a NE as aspect got a ECTP29 at 56cm down, breaking below the new snow and a 12cm knife-hard sl slab Broke on small facets (<1mm) in between wind slabs. I marked the tr trigger point n red. Skinned up a low angle gully up to around 9500’. As I got near the steepest part of the gully (38°), a soft slab slab 8” thick propagated 100’ wide and slid 500’ back down to my pit. No one was caught. Contrary to my pit, this ENE aspect slid aspect the new snow on top of a previous wind slab. wind slab on the bed surface bed surface snow/old snow interface. Found safer skiing down low in the trees where there was less wind loadin wind loading

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
2
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
16.0 inches
Vertical Fall
500ft
Slab Width
100.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year