Hi Canie. It appears they have an unique solution to an unique problem although I fail to see how holes filled with concrete will prevent the plates from moving as most of the rocks that keep the plates from moving (up to a point) are much bigger then any hole they could drill.

I also get the impression they drill straight down as opposed to across the fault. Not sure how that would stop the plates from drifting. Then again maybe they drill at an oblique angle. Not sure if that is a good idea in Texas and Oklahoma as some of the owners of the oil fields may get the impression they are trying to tap into their wells.

I'm kind of curious as to what kind of concrete they use. I could use some of that around my BBQ as sometimes I get carried away with the amount of starter fluid I put on the charcoal. I have since learned to light it with a match on a twenty foot pole. Even then there are times I singe the eyebrows. Maybe I should use a flame-thrower. Of course I could use regular starter fluid instead of the napalm I bought at a surplus store. It might also make my neighbors a little more at ease. Take Care…Don the old BBQ master