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.
Tennessee Sinkhole Risk. KNOXVILLE, Tenn. (WVLT) Tennessee happens to be one of the top 5 states with the highest risk for sinkholes. Sinkholes like the ones that have formed recently in Florida are caused by ground water eroding soft rock such as limestone several feet below the surface.