Location: Logan Dry Canyon - DB. Observation date: March 3, 2018, 12 pm. Date of Occurrence: unknown Elevation: 8,800 ft, North aspect, Trigger: Likely cornice fall, 2' depth. Wide slab avalanche across a good portion of the east side of DB bowl, occurrence date unknown. Crown about 10 or 20 feet below the cornice line, ~700 ft wide. Only ran ~150 vertical feet into the trees immediately below the ridge line. Likely culprit was cornice fall, there was lots of additional cornice fall on both flanks of the avalanche continuing around to Little Baldy. Lots of wind from the south building up the cornices. These cornices have grown substantially in the last 2-3 weeks as I would expect with all the recent snow. Attached picture shows location and extent.