What people hear is only a small fraction of the actual power of these sounds. They are low-frequency acoustic emissions in the range between 20 and 100 Hz modulated by ultra-low infrasonic waves from 0.1 to 15 Hz. In geophysics, they are called acoustic-gravity waves; they are formed in the upper atmosphere, at the atmosphere-ionosphere boundary in particular. There can be quite a lot of causes why those waves are generated: earthquakes, volcanic eruptions, hurricanes, storms, tsunamis, etc. However, the scale of the observed humming sound in terms of both the area covered and its power far exceeds those that can be generated by the above-mentioned phenomena.
--ciach--
There is one more possible cause of these sounds and it may lie at the Earth's core. The fact is that the acceleration of the drift of the Earth's north magnetic pole which increased more than fivefold between 1998 and 2003 and is at the same level today points to intensification of energy processes in the Earth's core, since it is processes in the inner and outer core that form the Earth's geomagnetic field. Meanwhile, as we have already reported, on November 15, 2011 all ATROPATENA geophysical stations which record three-dimensional variations of the Earth's gravitational field almost simultaneously registered a powerful gravitational impulse. The stations are deployed in Istanbul, Kiev, Baku, Islamabad and Yogyakarta, with the first and last one being separated by a distance of about 10,000 km. Such a phenomenon is only possible if the source of this emanation is at the Earth's core level. That huge energy release from the Earth's core at the end of the last year was some kind of a start signal indicating the transition of the Earth's internal energy into a new active phase.
I proszę nie tłumaczcie mi, że Wasze nagrania zawierają fase subsoniczne od 0,1 Hz do 15 Hz bo padnę ze śmiechu.
Artykuł polecam, zawiera ciekawe ilustracje obrazujące miejsca pomiaru osobliwości.
Winien jest jakiś nieznany proces energetyczny, zachodzący w rdzeniu naszej planety. Proces, który generuje energię soniczną większą od znanych przyczyn (trzęsienia ziemi, flary słoneczne itp.).
Zatem dalej nie wiemy co, chociaż wiemy jakie.