Camp West avalanche

triggered when I skinning on the ridge to the saddle for digging a pit, 4a in the book, SE - around 2250 thickness of trigger point around 40cm, 10cm thick of facets buried underneath,  width of crown around 80m+, thickness of crown 40-150cm, run length 1000m+ to the valley bottom crack propagate back to the ridge around next 40m to other open slope