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Title:Radon anomalies in soil gas caused by seismic activity
Authors:ID Zmazek, Boris (Author)
ID Živčić, Mladen (Author)
ID Todorovski, Ljupčo (Author)
ID Džeroski, Sašo (Author)
ID Vaupotič, Janja (Author)
ID Kobal, Ivan (Author)
ID Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Copyright holder)
Files:.pdf Acta_geotechnica_Slovenica_2004_Zmazek_et_al._Radon_anomalies_in_soil_gas_caused_by_seismic_activity.pdf (271,01 KB)
MD5: 65D8C2B72DD137B1361ADA3320BFD5C7
PID: 20.500.12556/dkum/9ec3dac6-1a23-4737-898d-b947b2e883f9
 
URL http://fgserver3.fg.um.si/journal-ags/2004/article-2.asp
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:At the Orlica fault in the Krško basin, combined barasol detectors were buried in six boreholes, two along the fault itself and four on either side of it, to measure and record radon activity, temperature and pressure in soil gas every 60 minutes for four years. Data collected have been analysed in a manner aimed at distinguishing radon anomalies resulting from environmental parameters (air and soil temperature, barometric pressure, rainfall) from those caused solely by seismic events. The following approaches have been used to identify anomalies: (i) ± 2σ deviation of radon concentration from the seasonal average, (ii) correlation between time gradients of radon concentration and barometric pressure, and (iii) prediction with regression trees within a machine learning program. In this paper results obtained with regression trees are presented. A model has been built in which the program was taught to predict radon concentration from the data collected during the seismically inactive periods when radon is presumably influenced only by environmental parameters. A correlation coefficient of 0.83 between measured and predicted values was obtained. Then, the whole data time series was included and a significantly lowered correlation was observed during the seismically active periods. This reduced correlation is thus an indicator of seismic effect.
Keywords:radon in soil gas, environmental parameters, earthquakes, correlation, regression trees, forecasting
Publication status:Published
Publication version:Version of Record
Year of publishing:2004
Number of pages:str. 12-19
Numbering:Letn. 1, št. 1
PID:20.500.12556/DKUM-70483 New window
ISSN:1854-0171
UDC:546.79:004.8
ISSN on article:1854-0171
COBISS.SI-ID:18701351 New window
NUK URN:URN:SI:UM:DK:PEW1ITSP
Copyright:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
Publication date in DKUM:15.05.2018
Views:1784
Downloads:89
Metadata:XML DC-XML DC-RDF
Categories:Misc.
:
ZMAZEK, Boris, ŽIVČIĆ, Mladen, TODOROVSKI, Ljupčo, DŽEROSKI, Sašo, VAUPOTIČ, Janja and KOBAL, Ivan, 2004, Radon anomalies in soil gas caused by seismic activity. Acta geotechnica Slovenica [online]. 2004. Vol. 1, no. 1, p. 12–19. [Accessed 10 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=70483
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Record is a part of a journal

Title:Acta geotechnica Slovenica
Shortened title:Acta geotech. Slov.
Publisher:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
ISSN:1854-0171
COBISS.SI-ID:215987712 New window

Secondary language

Language:Slovenian
Title:Anomalije radona v talnem zraku, povzročene s seizmično aktivnostjo
Abstract:Vzdolž preloma Orlica v Krški kotlini merimo koncentracijo radona v talnem zraku z avtonomnimi kombiniranimi instrumenti barasoli. Na šestih lokacijah, dve na samem prelomu in po dve na vsaki strani preloma, merimo aktivnost radona, temperaturo in zračni tlak štiri leta vsakih 60 minut. Rezultate meritev smo analizirali z namenom, da bi razlikovali med anomalijami radona, ki jih povzročajo hidrometeorološki vplivi (temperatura zraka in tal, zračni tlak in količina padavin) in tistimi, ki jih povzroča seizmična aktivnost. Za identifikacijo anomalij smo uporabili naslednje metode: (i) ± 2σ odklon koncentracije radona od sezonskih povprečnih vrednosti, (ii) korelacijo med časovnim gradientom koncentracije radona in časovnim gradientom zračnega tlaka, in (iii) regresijska drevesa s programi strojnega učenja. V tem članku predstavljamo rezultate, ki smo jih dobili z regresijskimi drevesi. Model je bil zgrajen v času seizmične neaktivnosti, v času, ko na koncentracijo radona vplivajo le hidrometeorološki parametri. Na podlagi tega lahko model napove koncentracijo radona za neseizmično obdobje s korelacijskim koeficientom 0,83. V času seizmične aktivnosti je napoved koncentracije radona veliko slabša. To znižanje korelacijskega koeficienta kaže na vpliv seizmične aktivnosti.
Keywords:radon, talni zrak, okoljski parametri, potresi, korelacija, regresijska drevesa, napovedovanje


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  1. Acta geotechnica Slovenica

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