Did termites kill this pine?

This pine cane down in the recent snow and ice, but the top of it looks healthy. The tree broke just above the ground and it looks like something's been living in it. This is the second pine to come down in a week but the first one broke high up. I'm in Virginia and I think these are Virginia pines. They're along the fence between my farm and a neighbor's cow field. What do I do? I have 20 acres, most open but surrounded on 3 sides by hundreds of acres of woods. My house is a 1940a stick built with brick over, and I've got 20 ish huge oaks around the house. I'm feeling panicky.