A deep slab avalanche was triggered using explosives on 1/24/2020 in the North Summit Snowfield at Big Sky Resort.
From email: "The Whale came out close to 10’ deep that tapered to 3’ on the skiers right edge... It broke on basal facets, thin layer, 1F hard at crown (!) with very hard snow above and below the layer that failed .... It is likely that the layer that failed had some different characteristics lower in the path that avalanched away- possibly less hard."