Acoustic, electromagnetic, neutron emissions as seismic precursors

Three different forms of emission might be used as earthquake precursors for environmental protection against seismicity. At the tectonic scale, Acoustic Emission (AE) prevails, as well as Electro- Magnetic Emission (EME) at the intermediate scales, and Neutron Emission (NE) at the nanoscale. TeraHertz pressure waves are in fact produced at the last extremely small scale, and fracture experiments on natural rocks have recently demonstrated that these high-frequency waves are able to induce nuclear fission reactions with neutron emissions. The authors present the results they are obtaining at a gypsum mine located in Northern Italy. The observations reveal a strong correlation between AE/EME/NE events and the major earthquakes in the surrounding area.