Ice climber triggered wind slab in Hyalite

Hyalite - main fork
Northern Gallatin
Code
HS-AF-R1-D1-I
Aspect
W
Latitude
45.42920
Longitude
-110.95500
Notes
From an email:
"Hit a small, unstable pocket while hiking in Hyalite today. We were traversing under the cliff band between Dielectric Breakdown over to Alex's Solo 1. The layer broke at a boundary between older snow and recently wind-transported slab. No consequences his time, but it is a great reminder of how quickly conditions can change when you're hiking. In the wrong terrain, a slide like this could be really bad."
Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Foot penetration
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters