Remote trigger and low visibility

We performed 2 compression tests Sudden collapse, 25cm down on light 4 Storm slab failed on surface hoar Failure , 45cm down on medium 4 Unknown layer possibly a rain or warming layer Sudden collapse, 60cm down on hard 1 Failure was on facets below a rain rain crust Results were roughly same on both of our tests

Avalanche was triggered by snowmobile riding on the area above the avalanche slope. The recent storm slab slid on a surface hoar layer roughly 25 cm down