These are electromagnetic in nature. One of the primary uses of ELFs is to communicate with our submarines. Dr. Andrija Puharich, a highly respected researcher, in an attempt to warn U.S. officials about Russian use of ELFs, set up an experiment. They were sealed in a metal room that could not be penetrated by a normal signal. Puharich then beamed ELF waves at the volunteers.
ELFs go right through the earth and, of course, right through metal walls.
Those inside couldn't know if the signal was or was not being sent. Waves below 6 cycles per second caused the subjects to become very emotionally upset, and even disrupted bodily functions. At 8.2 cycles, they felt very high, an elevated feeling, as though they had been in masterful meditation, learned over a period of years. Eleven to 11.3 cycles induced waves of depressed agitation leading to riotous behavior. The Neurophone Dr. Patrick Flanagan is a personal friend of mine.