fuagf -- and then there's the energy that would have to be put into the outgoing canceling waves -- it's one thing to create waves that cancel the relatively tiny amount of energy in some incoming microwave or infrared radiation -- it'll be another to, for example, create outgoing ocean waves around an offshore oil rig to cancel incoming ocean waves comprised of many millions of tons of moving water -- the energy content of the incoming waves will have to be matched by the energy (somehow, at some [substantially] less than 100% efficiency) put into the created outgoing waves -- if the physical contraption to actually do such a thing could even be conceived, designed and made, the contraption itself would dwarf and cost many times more than whatever it was being made to protect, and would, separately, need its own always-instantly-available-on-demand multiple-Gw source of power (if such a thing is even available with anything close to the 'instant-full-on-from-nothing' capability that would be needed)
and never mind the mechanism and energy source that would be required for creating outgoing waves in the ground around a protected site to cancel the incoming waves in the ground of a major earthquake (or the fact that those created waves would then constitute their own earthquake radiating out from the protected site) (and how the hell would they propose to uncouple the protected site itself, which would after all have to be the epicenter of the created counter-earthquake, from the creation of the outgoing ground waves of the counter-earthquake?) (or put another way, earthquakes create permanent displacements of the ground; at some point, net-net, the protected site has to move -- . . .)
this tech, as it is already showing, will no doubt have many and important applications at a micro level, and even to a macro level in terms of dealing with just electromagnetic radiation/waves -- but it will never be practical in terms of canceling waves comprised of countless gigatons of moving earth or many millions of tons of moving water at the scale of a building or an offshore oil rig
Greensburg, KS - 5/4/07
"Eternal vigilance is the price of Liberty."
from John Philpot Curran, Speech
upon the Right of Election, 1790
F6