This post raises good questions.
Although I think the spiral is the result of electromagnetic waves, Wilcock's explanations does not constitute irrefutable proof.
As some pointed, he is a great spiritual teacher but he lacks a clear understanding of electromagnetism and physics in general. It even more shows in his books Shift Of The Ages and The Science Of Oneness.
I can only praise his attempt to synthesize all this information (God knows it is a herculean task), but he tends to jump at conclusions without any solid (scientific) proof.
I am also concerned by his following which is increasingly showing signs of a personality cult.
Two weeks ago I tried to post on the Divine Cosmos forum a critique of Sitchin's work (available here on Avalon at
http://projectavalon.net/forum/showthread.php?t=19269) which was rejected without any explanation. In his books Wilcock cites some of Sitchin's assertions which are proven to be wrong, and I think it is important to point out these mistakes, intentional or not.
Does this mean that anything David Wilcock says or writes cannot be contradicted ?