Remote trigger and low visibility

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

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