I'll give you that. I think PA has an underground fire that has been burning to more than 100 years.
When I consider disasters like this my first thought is to discover who has the most to gain from a disaster like that, and then what method they might use. Finally I move to accidental causes and the most likely method. When dealing with humans I always consider that stupidity will win out over intent, so that's why I ended up where I did.
I also saw the trailer park in Facebook posts and it certainly did not look like the place Gman later mentioned. Given my experience in life it is only natural I would see things the way I do.
My family has lots of firemen from Florida to Northern Alaska, so I have heard the stories of what they find. That only serves to reinforce my way of thinking. They'll figure it out once things settle down.