Skier Triggered Avalanche - Miner's Gully

Observed what we suspect to be a skier accidental size 2.5 slab avalanche in Miner's Gully Tuesday morning. Tracks were observed entering and exiting the avalanche, and we didn't receive any 911 notifications, so not sure if anyone was caught, carried and/or buried. The avalanche appeared to step down to ground in some spots and had highly variable fracture depths. After flowing down the gully the avalanche then propagated across a portion of the bowl.