I apologise if this has already been brought up (I've only skimmed the thread), but I'm confused about this YouTube video. Perhaps, rorylee, you can clear it up for me.
It's my understanding that the studies conducted at HAARP are electromagnetic in nature. So when in that video the exploration geophysicist introduced his work in Oregon, I assumed that he was using something like ground penetrating radar. The picture shown of workers in the field with a large antenna seem to confirm that EM radiation was used. But then in the section showing his lab demonstration, the man uses a loudspeaker to mobilise the unstable rock, and says that ELF waves are like those produced by a subwoofer.
Now of course loudspeakers do indeed produce electrical signals, because that's how the diaphragm is made to vibrate. But in the case of the geophysicist's model, I don't think that the EM waves produced by the speaker were the immediate cause of the slip; the resonance that he spoke of was caused by pressure waves. And yet the comparison was drawn with HAARP. Was the geophysicist using an EM or a seismic method? If EM, why in his model did he use a subwoofer rather than an EM device that would not produce acoustic waves? If seismic, what is the relationship to HAARP, an EM experiment?
I'm confused. Please, rorylee or anybody, could you help me out?