I've heard of it, but in my five or six years in Pennsylvania, we never visited there. There is a town in northern France that has the same problem though. The houses were built on areas that collapsed gradually next to the mines.
The govt had to pay them off but it's a horrid mess. The one side claiming they should have known, it's a natural phenomenon, the other that it's a man made problem.
At the moment I don't own a home, but I always worry about buying one again some day and getting it on some natural or man made disaster. Was just brooding over it this past weekend as I saw some poor people around this area lose their homes and some their lives in mudslides here in Southern France. Last year, roads went out...hills slid down, across the border in Italy, a doctor's house just slid down the hill and he was killed. It's unusual in a medieval village too!
Another thing I noticed in one area in Alsace is the proximity to the quarry, not only were there cracks and things beneath the housing development, but they got to do two dynamite things per week only so had to schedule them. On Fridays we'd hear it. All the houses built from new construction were cracked too.
Iceland would be another interesting place to study. We visited there and it seems as though the houses are being perpetually fixed and replastered from geophysical motion, geysers and what have you. The wind is so strong you can barely grow trees too.
I think the tour guide of Reykavik pointed out everything that resembled a bush or tree to us.
They do heat their water with it so guess it's not all bad.
I was wondering how on earth (appropriate term in this instance) you manage to put up any structures without finding out if they are located on a natural gas thing.
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I was born under a wandering star.