2 triggered during avalanche mitigation work, D2 + D2.5. Appeared to have released on SHxr below thin (<1cm) MFcr from 12/21 (Solstice Crust). Slab was the entirety of snow from 12/21 thru 12/26. Both start zones are extremely steep and unsupported (small hanging snow features/field above cliffs). Another round of control the work farther out on Arm produced no results on 12/28, no AS, AM or AR triggered avalanches on this layer to date. Natural D3 avalanche suspected at the same interface with lwind oading morning of 12/31.