With frequent observations of these sounds, I noticed that this mysterious sound can be heard before or after the bigger earthquake in the world. It probably has a connection from the shifting of the lithospheric plates. What do you think about it?
The mysterious sound is probably related to the earthquake in the world.
These may be associated with atmospheric changes or low frequency acoustic emissions in the range of 20 and 100 Hz, modulated by ultra-low infrared waves of 0.1-15 Hz.
The causes of their occurrence are different: earthquakes, volcanic eruptions, hurricanes, storms, artificial interventions into the atmosphere or the earth’s mantle …