Eric, is there any water circulation in your pond, or any springs. I've seen similar things on our pond where a small hole becomes larger with the weight of the ice pushing down on the water, there is usually a spring or some sort of water circulation under ice. This can sometimes happen when the ice freezes unevenly due to snow cover, the weight distribution of the ice becomes very uneven. Sunil, these were not old ice fishing holes at our pond, the spooky thing was that they never froze over even when the highs were in the mid teens, you could watch the water swirl and slowly poor over the ice as it got sucked up into some nearby snow and added more weight to the nearby area.
