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2016 | OriginalPaper | Buchkapitel

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

verfasst von : O. Borla, G. Lacidogna, E. Di Battista, M. Costantino, A. Carpinteri

Erschienen in: Fracture, Fatigue, Failure and Damage Evolution, Volume 8

Verlag: Springer International Publishing

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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.

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Titel: Environmental Protection by the Opto-acoustic and Neutron Emission Seismic Precursors
verfasst von: O. Borla
G. Lacidogna
E. Di Battista
M. Costantino
A. Carpinteri
Verlag: Springer International Publishing
Buch: Fracture, Fatigue, Failure and Damage Evolution, Volume 8
Print ISBN: 978-3-319-21610-2

Electronic ISBN: 978-3-319-21611-9

Copyright-Jahr: 2016
DOI: https://doi.org/10.1007/978-3-319-21611-9_21

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