We experienced this on avalanche control at stevens yesterday.
Signs of Unstable Snow
Did you see shooting cracks?
Did you experience collapsing or whumpfing?
This was a n-ne aspect. We ski cut the slope first, then threw a hand charge about 75ft downhill of this start zone. Nothing moved with the ski cut, but the entire surrounding area whumphed when the charge went off and the entire slope above the charge fractured into 3-5ft blocks creating a d2 avalanche.