Observation Sub Peak

Traveling up the drainage to Obersavation Sub Peak on the Icefield Parkway. We noticed an overhanging crown which likely had broken within the 24 hrs producing a large D2 avalanche below. We also noticed a collection of smaller avalanche which must have broken as a result of the over hanging crown. We did notice an older avalanche higher up on Observation Sub Peak, but we didn’t travel high enough to get an observation.