I suspect natural trigger but could have been remotely triggered as trail systems are close by.
Recent persistent slab avalanche cycle 11/7-8 with storm load, 10" new low-density snow at 3000'. Recent remotely triggered avalanches 11/8-9. Improved stability, but poor structure will persist and allow for human-triggered avalanches to be possible in specific locations on slopes 30 degrees and steeper. This PWL (persistent weak layer) will continue to be problematic for a long time and reactivated with new loads. The faceted PWL is sitting on a patchy, slippery ice crust bed surface at the ground . Variability in test results today were due to increased stability and variability in slab cohesion and a slab that is barely cohesive enough to act as a slab.