title: Acoustic, Electromagnetic, and Neutron Emissions as Seismic Precursors
abstract: Abstract Three different forms of fracto-emission can be used as earthquake precursors. At the macro-scale, Acoustic Emission (AE) prevails, as well as Electromagnetic Emission (EME) at the meso-scale, and Neutron Emission (NE) at the micro- and nano-scale. TeraHertz phonons are in fact produced at the last extremely small scale by mechanical instability phenomena, and fracture experiments on natural rocks have recently revealed that these high-frequency waves are able to induce nuclear fission 