[RightWhale]

What are he chances that they just screwed up their measurements?

Things are drifting around with relative motions. Some things have moved 19 mles, some haven't. They might also be taking gravimetric measurements of the body of the moon for comparison. The measurements are fairly tight by the nature of the instruments.

[norton]

Thanks.

This means the crust is (very) flexible &/or loosely bound together(?)