The range of 60-70 decibels sound pressure level is about as loud as normal conversation in 1 meter distance.
Flammable, Radioactive Sinkholes. Lesser known in the mainstream media, however, is frackingâs link to massive sinkholes appearing overnight and leaking radiation across the nation.
In the language of geologists, the process that causes sinkholes is the creation of a void which migrates towards the surface. In the language of the layman, when there's not enough solid stuff left underneath to support what is left of the loose stuff above, the whole lot collapses.