I believe I may have found more proof that the mysterious noises that people are reporting is caused by the earths magnetosphere and the magnetic composition of earths crust.



[link to www.nasa.gov (secure)]

Magnetic reconnection occurs around Earth every day due to magnetic field lines twisting and reconnecting. It happens in different ways in different places, with different effects. In the magnetotail, for example, the process can create aurora near Earth. In the magnetotail the event watched by MMS was found to fling particles symmetrically, unlike how it does on the sunward side of Earth. Out front, the solar wind — a constant flow of charged particles from the Sun — pushes into Earth’s magnetic field. Because of their different densities, the two sides connecting are unequal, which causes magnetic reconnection to occur asymmetrically. On the backside, however, in the magnetotail, the explosion stems from an entanglement of two sets of — similarly intense — Earth field lines, so the particles are accelerated nearly the same in both directions.
[less than 50%]





On earth as these magnetic fields reconnect and entangle with each other the same effect should take place causing booms or the tone that people are reporting as the mysterious noises. This is just a guess on my part though.