ECT on N aspect, 2240 elevation, HS 105cm produced failure with full propagation across the column @ 18cm on top of the Feb 3 MFcr. Remainder of the pack was stubborn, with no other instabilities noticed. Mainly facets, depth hoar and crust. Observed 2 slide paths from Cornice failure on N aspect running down to the feb 3 crust. Size 1-1.5. Found good supportive crust for skiing down to 2150m, below that it became inconsistent.