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.
Sinkholes around the world. 1  1/9 Dunedin, Florida The rear portion of a residential home is consumed by a sink-hole November 14, 2013. According to reports, the large sink-hole began to form between two houses the morning of November 14, and grew to size of about 30 feet wide by 30 feet deep.