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Differentiating between artificial and natural sources of electromagnetic radiation at a seismogenic fault
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SYSNO ASEP 0564839 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Differentiating between artificial and natural sources of electromagnetic radiation at a seismogenic fault Author(s) Baroň, Ivo (USMH-B) ORCID, SAI
Koktavý, P. (CZ)
Trčka, T. (CZ)
Rowberry, Matthew David (USMH-B) RID, ORCID, SAI
Stemberk, Josef (USMH-B) RID, ORCID
Balek, Jan (USMH-B) ORCID
Plan, L. (AT)
Melichar, R. (CZ)
Diendorfer, G. (AT)
Macků, R. (CZ)
Škarvada, P. (CZ)Number of authors 11 Article number 106912 Source Title Engineering Geology. - : Elsevier - ISSN 0013-7952
Roč. 311, DEC 20 (2022)Number of pages 15 s. Language eng - English Country NL - Netherlands Keywords Electromagnetic radiation ; Brittle rock strain ; Microcracking ; Seismogenic fault ; Eastern Alps Subject RIV DB - Geology ; Mineralogy OECD category Geology R&D Projects LM2015079 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support USMH-B - RVO:67985891 UT WOS 000886066300001 EID SCOPUS 85141259533 DOI 10.1016/j.enggeo.2022.106912 Annotation Ultralow frequency (ULF) to low frequency (LF) electromagnetic radiation represents one of the most promising effects of brittle rock strain and microcracking that might be potentially helpful for short term earthquake forecasting. In this study the results of a six month monitoring campaign are presented from Obir Cave in the eastern Alps. Direct experimental observations of electromagnetic radiation have been made using a customised broadband data logger installed next to the Obir Faultthis seismogenic fault near the Periadriatic Lineament is known to be related to at least three large prehistoric earthquakes. On the basis of these measurements it has been possible to characterise a number of distinct signals: artificial constant narrowband signals at discrete frequencies, short serial broadband impulses, high energy broadband impulses, and low energy broadband im-pulses. The narrowband artificial signals were removed from the electromagnetic radiation time series analysis so that the natural signals were enhanced and could be compared more easily to meteorological parameters and rock strain indicators. Critically, the high energy broadband impulses show a strong correlation with lightning activity across much of central Europe and the eastern Mediterranean while the low energy broadband impulses appear to be associated with local rock strain in and around Obir Cave. Unfortunately, it seems certain that some of the essential strain related impulses are likely to have been overprinted by the larger lightning related impulses. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0013795222003970
Number of the records: 1