Small avalanche at ha ling/ miners peak gulley

Small avalanche triggered by first person down on a less covered part of gulley on ha ling/miners. Noticed lots of dry loose/slough on the way down. Triggered what appeared to be a weak layer approximately 15 cm down about 30 feet wide at the crown and narrowed as it moved down the gully. The slope was around 30-40 degrees and south east side.