High Frequency Active Auroral Research Program HAARP.
In radio broadcasting it has been found that if you place two 500,000 watts transmitters on a frequency and tune the center freq just 1/2 phase off you can achieve a 1 mega watt output. If you place the antennas so that they point to the same place on earth based upon the bounce the signal at the destination is the sum of that signal.
If instead you align the Haarp's 1000 antennas per field on the ionosphere at a specific location with no bounce the multiple signals cause the Ionosphere at this point to become superheated and as it warms it raises. This in simplistic terms is the creation of a low pressure zone. This raising causes clouds to rise and cool. The rising also causes the air to fill the void. This movement into this void dependent upon the direction of the previous winds can cause a spiral wind that may even become a thunderstorm that spawns Tornados.
This is based upon a single frequency.
Now if I know from research that the frequency of the earth, yes it has a frequency, and set the 1000 antennas in Alaska to transmit on an angle that will return to earth at say the fault in Arkansas. I do the same thing at the field in Utah. I set the frequency to be just 1/2 cycle higher than the resonant freq of the Fault on the Utah Transmitters. Then I set the Alaska Transmitters to arrive just 1/2 cycle lower than the fault freq, but 180 degrees out of phase.
The fault will feel that difference and the resonant freq will be modulated at the 1/2 cycle difference, the 1/2 cycle plus the frequency, and the center frequency. If sustained and adjusted by phase carefully the fault which is two sheets of resonant rock will begin to jitter so slightly, but since it will do this for the total length of the slabs it will wear chips off the edges. If done long enough or with enough power the fault will eventually slip.
Ergo an Earthquake.
This earth is always vibrating. They dropped the bridge in California by having the vehicles simply bounce on pavements. Not intentionally, but effectively.
Sound is a part of every structure. That is why they put absorbers in the bases.
If you sit in a room and I pipe in sub audible sound aves of low frequencies I can cause you to be very angry. If they get low enough you will even get ill to your stomach. If they get really low like 6.5 to 7 cps you will eventually die.
Yes HAARP works!