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Seismic Beacon-A New Instrument for Detection of Changes in Rock Massif
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SYSNO ASEP 0584937 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Seismic Beacon-A New Instrument for Detection of Changes in Rock Massif Author(s) Lukešová, Renata (USMH-B) ORCID, RID
Málek, Jiří (USMH-B) RID, ORCID, SAINumber of authors 2 Article number 234 Source Title Sensors. - : MDPI
Roč. 24, č. 1 (2024)Number of pages 16 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords seismic beacon ; nonlinear phenomena ; harmonic seismic wave OECD category Geology R&D Projects TP01010055 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) Method of publishing Open access Institutional support USMH-B - RVO:67985891 UT WOS 001140346300001 EID SCOPUS 85181958381 DOI 10.3390/s24010234 Annotation The seismic beacon is a new instrument that allows for the measurement of changes in a rock massif with high sensitivity. It is based on effects, which affect the propagation of harmonic seismic waves generated continuously with stable and precise frequency and amplitude. These seismic waves are registered by a system of seismic stations. The amplitude of the seismic signal is very small, and it is normally hidden in a seismic noise. Special techniques are applied to increase the signal-to-noise ratio. In 2020, the first prototype of the seismic beacon was constructed in a laboratory, and field tests were performed in 2022 and 2023. During the tests, the changes in spectral amplitude and phase of seismic waves were detected, which is interpreted as the changes in material properties. These measurements testified the basic functionality of the device. The seismic beacon has been developed primarily for the detection of critical stress before an earthquake, which is manifested by non-linear effects such as higher harmonics generation. In addition, it could be used, for example, in the detection of magma movements, groundwater level changes, changes in hydrocarbon saturation in rocks during the extraction of oil and natural gas, or the penetration of gases and liquids into the earth's crust. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2025 Electronic address https://doi.org/10.3390/s24010234
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