......an electrical configuration called a "Rodin coil." In the first video, notice the vibration and the buzzing sound that accompanies the device when it's energized. Also notice how the small neodymium magnets are seperated violently when the device is energized. Could this be a possible explanation for the "cannon" sounds that are sometimes heard ("Seneca Guns", for example.).............Could this be related to the humming, buzzing noises that are often heard in localized areas, and also be responsible for the localized earth movements? Earlier in this thread there was a report from an eyewitness on Vancouver Island which described similar effects.

One way that might be able to create enough current in a subterranean ferric deposit could involve "constructive interference". "Constructive interference" occurs when two or more waves coincide, in phase,and the resulting wave is the sum of the the coincident waves. That is, if there is a conductive path for the current to flow through.