The energy is already in the system. You are not understanding. Where did the earth get all this energy? It was already there.
The problem with this line of reasoning is that it renders the use of such an "earthquake generator" completely pointless for all except benevolent reasons.
Conspiracy people need to learn how earthquakes work before spewing nonsense. There is a slow, gradual accumulation of pressure in the Earth's crust. This pressure cannot be safely eliminated by any known force or currently existing technology. So the pressure can only continue to build. Once it surpasses a certain threshold, it is released in a mighty shockwave.
What this means is that as far as modern technology is concerned, earthquakes are
inevitable. Once pressure starts building between techtonic plates, an earthquake WILL happen and it is only a matter of time. The
best possible scenario is for the earthquake to happen BEFORE the energy can accumulate to truly dangerous levels.
Do you understand? The earthquake is (1) inevitable, and (2) will only be more powerful the more time passes without the pressure being released.
This means that a device that causes an earthquake to occur prematurely
can only be beneficial for humanity.
Suppose for the sake of argument that the 8.9 in Japan was caused by HAARP. This means that had HAARP NOT been used, the pressure in the crust would've simply built more and more before the quake inevitably did occur. So when the quake DID occur it would be even WORSE than an 8.9. Meaning the use of HAARP did Japan a favor.
And if by its very nature a device can only possibly be BENEFICIAL for humanity, then there is no reason, none, whatsoever, to "cover up" its existence.
It's the same thing I tell 9/11 conspiracy nutbags who claim WTC7 was demolished for "safety reasons" or that Flight 93 was shot down to protect the Capitol from being hit. If you did the right thing then there is no need to hide that fact. If I could trigger earthquakes prematurely using HAARP I would, and I consider myself a good guy.