The acoustic (AE) and electromagnetic (EM) emission signals detected during the failure of brittle materials are analogous to the anomalous mechanical and geoelectromagnetic waves observed before major earthquakes. These phenomena reinforce the idea that opto-acoustic emissions can be applied as a forerunning tool for seismic events. The elastic energy released by micro-cracking eventually yields to form macroscopic fractures, whose mechanical vibrations are converted into electromagnetic oscillations over a wide range of frequencies, from Hz to THz. This excited state of the matter could be the cause of resonance phenomena at the nuclear level producing neutron bursts, in particular during stress-drops or sudden catastrophic failures. The authors present the results they are obtaining at a gypsum mine located in Northern Italy. The observations revealed a strong correlation between AE/NE events and the closest and most intense earthquakes. Thanks to the position of the monitoring station (100 m under the ground level), the acoustic and electromagnetic noise from human activities is greatly reduced, as well as the neutron background. An integration of AE/EME/NE data with CO2 and Radon variations, that are considered as additional seismic precursors, is planned.

Environmental Protection by the Opto-acoustic and Neutron Emission Seismic Precursors / Borla, Oscar; Lacidogna, Giuseppe; DI BATTISTA, Emanuela; Costantino, M.; Carpinteri, Alberto. - STAMPA. - 8:(2016), pp. 165-173. (Intervento presentato al convegno Annual Conference on Experimental and Applied Mechanics (SEM) tenutosi a Hilton Orange County, Costa Mesa, CA USA nel June 8-11, 2015) [10.1007/978-3-319-21611-9_21].

Environmental Protection by the Opto-acoustic and Neutron Emission Seismic Precursors

BORLA, OSCAR;LACIDOGNA, GIUSEPPE;DI BATTISTA, EMANUELA;CARPINTERI, ALBERTO
2016

Abstract

The acoustic (AE) and electromagnetic (EM) emission signals detected during the failure of brittle materials are analogous to the anomalous mechanical and geoelectromagnetic waves observed before major earthquakes. These phenomena reinforce the idea that opto-acoustic emissions can be applied as a forerunning tool for seismic events. The elastic energy released by micro-cracking eventually yields to form macroscopic fractures, whose mechanical vibrations are converted into electromagnetic oscillations over a wide range of frequencies, from Hz to THz. This excited state of the matter could be the cause of resonance phenomena at the nuclear level producing neutron bursts, in particular during stress-drops or sudden catastrophic failures. The authors present the results they are obtaining at a gypsum mine located in Northern Italy. The observations revealed a strong correlation between AE/NE events and the closest and most intense earthquakes. Thanks to the position of the monitoring station (100 m under the ground level), the acoustic and electromagnetic noise from human activities is greatly reduced, as well as the neutron background. An integration of AE/EME/NE data with CO2 and Radon variations, that are considered as additional seismic precursors, is planned.
2016
978-3-319-21610-2
978-3-319-21611-9
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2638302
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo