Statistical properties of seismic noise measured in underground spaces during seismic swarm

Lyubushin, A. A.; Kaláb, Zdeněk; Lednická, Markéta

doi:10.1007/s40328-014-0051-y

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…Since 2008, more than 2000 earthquakes from West Bohemia were recorded on JER1 station during three intensive seismic swarms in the years 2008, 2011, and 2014. The first analysis of vibration effect in the Jeroným Mine during these seismic swarms was described in the papers by Kaláb and Lednická (2011), Lednická and Kaláb (2013), Lyubushin et al (2014), and Kaláb et al (2015). According to the presented results, the measured vibration velocity values reached up to 0.8 mms í1 at JER1 station for an earthquake with local magnitude M L 3.6.…”

Section: Introductionmentioning

confidence: 79%

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Lednická

Kaláb

2016

Acta Geophys.

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The shallow medieval Jeroným Mine is located at a distance of about 25 km southeast of the Nový Kostel focal zone where the most intensive seismic activity in West Bohemia (Czech Republic) has been documented. Permanent seismological monitoring has been carried out since 2004 in this mine. During the 2011 and 2014 seismic swarms, more than 1000 triggered records comprising almost 1500 earthquakes were recorded at the permanent station in the mine. Three short-term seismological experiments were accomplished during these swarms. Several temporary seismic stations were simultaneously placed in different parts of underground spaces which enabled comparison of vibration effect caused by near earthquakes in different parts of the mine. Although the depth of the lowest parts of mine is only about 60 m, a vibration effect generated by earthquakes from the Nový Kostel focal zone is not the same for the whole underground complex.

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Section: Introductionmentioning

confidence: 79%

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Lednická

Kaláb

2016

Acta Geophys.

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“…Several recent papers have evaluated of structural stability of the mine (Froňka et al 2013;Lednická and Kaláb 2013;Kaláb and Lednická 2016; Fig. 1 The location of the Jeroným Mine on a map of the Czech Republic with recent photos of its access shafts and surroundings () photos: M. Rösnerová and Z. Kalab Lyubushin et al 2014). The lowest level is permanently flooded making its scope is unknown.…”

Section: Geological Setting and Sample Locationsmentioning

confidence: 99%

Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic

et al. 2021

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This study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the sixteenth century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg−1 to 1244 Bq kg−1, while 232Th varied from 25 Bq kg−1 to 55 Bq kg−1. The activities associated with 238U ranged from 46 Bq kg−1 to 386 Bq kg−1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff.

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“…The Jeroným Mine is a shaft mine consisting subsurface galleries, shafts and chambers spread across at least three horizontal levels ranging in depth from 10 to 50 m below the surface. Several recent papers have evaluated of structural stability of the mine (Froňka et al 2013;Lednická and Kaláb, 2016;Lyubushin et al 2014). The lowest level is permanently flooded making its scope is unknown.…”

Section: Geological Setting and Sample Locationsmentioning

confidence: 99%

Natural Radioactivity of Rocks from the Historic Jeroným Mine in the Czech Republic

Malczewski

Dziurowicz

Kaláb

et al. 2021

Preprint

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This study reports the natural radioactivity of characteristic rocks found in the historic Jeroným Mine of the Czech Republic as measured under the laboratory conditions. The rocks analyzed included granites and schists weathered to varying degrees and collected from different levels of the underground workings of the Jeroným Mine. The mine itself has been subject to metal extraction (mainly tin and tungsten) since the 16th century and has recently been developed as a cultural and scientific attraction open to the public. Activity concentrations of 40K, 232Th and 238U were measured from nine rock samples using gamma-ray spectrometry. The activity concentrations of 40K varied from 595 Bq kg− 1 to 1244 Bq kg− 1, while 232Th varied from 25 Bq kg− 1 to 55 Bq kg− 1. The activities associated with 238U ranged from 46 Bq kg− 1 to 386 Bq kg− 1. The measured activities were used to estimate two radiation hazard indices typically applied to building materials, the activity concentration index I and the external hazard index Hex. Mean respective values of 1.02 and 0.77 for I and Hex indicate that the rocks found in the Jeroným Mine meet radiological safety standards for building materials and do not pose a risk to potential tourists and staff.

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Statistical properties of seismic noise measured in underground spaces during seismic swarm

Cited by 10 publications

References 19 publications

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Vibration Effect of Near Earthquakes at Different Depths in a Shallow Medieval Mine

Natural radioactivity of rocks from the historic Jeroným Mine in the Czech Republic

Natural Radioactivity of Rocks from the Historic Jeroným Mine in the Czech Republic

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