Estimation of an upper limit on prehistoric peak ground acceleration using the parameters of intact speleothems in caves situated at the western part of Balkan Mountain Range, North-West Bulgaria

Szeidovitz, Gy.; Paskaleva, I.; Gribovszki, Katalin; Kostov, Konstantin; Surány, G.; Varga, P.; Nikolov, Geno

doi:10.1556/ageod.43.2008.2-3.13

Cited by 9 publications

(9 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results show that the average failure tensile stress values of broken stalagmite samples from the Plavecká priepast cave ( σ u = 0.51 MPa) are considerably lower than the values we measured from another cave system 230 km further east, e.g. from Olimposz hall in the Baradla cave ( σ u = 1.62 MPa) and Ördöglik hall in the Domica cave ( σ u = 2.75 MPa) which were determined by different, but comparable methods as Brazilian test (Szeidovitz et al 2008a ; Gribovszki et al 2013b ). On the other hand, the average failure tensile stress value in this study is very close to the minimum value (0.4 MPa) of failure tensile stress measured on broken stalagmites from Hotton cave (Belgium) (Cadorin et al 2001 ) evaluated by a static bending test.…”

Section: Theoretical Calculations and Results Of Geomechanical And Elcontrasting

confidence: 75%

“…Similarly high growth rates were measured in Katerloch cave, in the Alps in Austria (0.2–0.7 mm/year), 180 km southwest of the study area (Boch et al 2006 , 2010 ). On the other hand, growth rates reported from stalagmites in Baradla and Domica caves, located 230 km east of the study area, are significantly lower (16 and 53 year/mm, respectively—Szeidovitz et al 2008a ; Gribovszki et al 2013b ).…”

Section: Age Determination Of the Stalagmitementioning

confidence: 82%

“…For a perfectly cylindrical stalagmite (i.e. constant diameter), simple equations can be deduced from cantilever beam theory (Cadorin et al 2001 ; Lacave et al 2000 ; Szeidovitz et al 2008a ). The natural frequency of a stalagmite would then be …”

Section: Theoretical Calculations and Results Of Geomechanical And Elmentioning

confidence: 99%

“…The ‘survival’ of vulnerable stalagmites requires that horizontal ground accelerations have never exceeded a certain critical value over time periods of thousand years or more. Such speleoseismological studies have been performed in several caves using an in situ approach (Lacave et al 2000 , 2004 ; Becker et al 2006 ; Szeidovitz et al 2005 , 2008a , 2008b ; Paskaleva et al 2008 ; Gribovszki et al 2008 , 2013a , 2013b ; Shanov and Kostov 2015 ) complemented by laboratory studies (Cadorin et al 2001 ; Paskaleva et al 2006 ; Bednárik 2009 ).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Estimating the upper limit of prehistoric peak ground acceleration using an in situ, intact and vulnerable stalagmite from Plavecká priepast cave (Detrekői-zsomboly), Little Carpathians, Slovakia—first results

et al. 2017

Self Cite

View full text Add to dashboard Cite

Earthquakes hit urban centres in Europe infrequently, but occasionally with disastrous effects. Obtaining an unbiased view of seismic hazard (and risk) is therefore very important. In principle, the best way to test probabilistic seismic hazard assessments (PSHAs) is to compare them with observations that are entirely independent of the procedure used to produce PSHA models. Arguably, the most valuable information in this context should be information on long-term hazard, namely maximum intensities (or magnitudes) occurring over time intervals that are at least as long as a seismic cycle. The new observations can provide information of maximum intensity (or magnitude) for long timescale as an input data for PSHA studies as well. Long-term information can be gained from intact stalagmites in natural caves. These formations survived all earthquakes that have occurred over thousands of years, depending on the age of the stalagmite. Their 'survival' requires that the horizontal ground acceleration (HGA) has never exceeded a certain critical value within that time period. Here, we present such a stalagmite-based case study from the Little Carpathians of Slovakia. A specially shaped, intact and vulnerable stalagmite in the Plavecká priepast cave was examined in 2013. This stalagmite is suitable for estimating the upper limit of horizontal peak ground acceleration generated by prehistoric earthquakes. The critical HGA values as a function of time going back into the past determined from the stalagmite that we investigated are presented. on the location of the Plavecká priepast cave is consistent with the critical HGA value provided by the stalagmite we investigated.The approach used in this study yields significant new constraints on the seismic hazard, as tectonic structures close to Plavecká priepast cave did not generate strong earthquakes in the last few thousand years. The results of this study are highly relevant given that the two capitals, Vienna and Bratislava, are located within 40 and 70 km of the cave, respectively.

show abstract

Section: Theoretical Calculations and Results Of Geomechanical And Elcontrasting

confidence: 75%

Section: Age Determination Of the Stalagmitementioning

confidence: 82%

Section: Theoretical Calculations and Results Of Geomechanical And Elmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Estimating the upper limit of prehistoric peak ground acceleration using an in situ, intact and vulnerable stalagmite from Plavecká priepast cave (Detrekői-zsomboly), Little Carpathians, Slovakia—first results

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…In contrast, the presence of intact speleothems indicates that, considering their growth, no earthquake-driven ground motions were sufficiently large to break them. Hence, knowing the speleothem's characteristics allows estimating an upper limit on past horizontal ground motions that did not result in the failure of studied speleothems [12][13][14][15][16][17][18][19][20]. This information provides an important view in the past seismicity in the area where the cave is located.…”

Section: Introductionmentioning

confidence: 99%

Characterizing Stalagmites’ Eigenfrequencies by Combining In Situ Vibration Measurements and Finite Element Modeling Based on 3D Scans

et al. 2020

View full text Add to dashboard Cite

Broken or deformed speleothems have been used as indicators of paleo-earthquakes since the 1990s; however, a causal link is difficult to prove except for some thin speleothems. In contrast, the presence of intact speleothems permits estimating an upper limit of the level of horizontal ground motions of past seismicity in the area. The natural frequencies of speleothems are fundamental parameters for their response to earthquakes. This study proposes a new method of in situ characterization of these natural frequencies. Tested in the Han-sur-Lesse cave (Belgian Ardennes), the method is based on recording the ambient seismic noise using three-component sensors on a stalagmite and a 3D laser scan of its shape. The ambient seismic noise records allow a precise determination of the eigenfrequencies of the stalagmite. In addition, numerical models based on the 3D scan show good consistency between measured and modeled data. The joint analysis of these two techniques concludes that the shape of the stalagmite (elliptical cross-section and shape irregularities) influence the eigenfrequencies and polarization of the modes while also causing a near-orthogonal split of natural frequencies. The motions recorded on the stalagmite show significant amplification compared to those recorded at the free surface outside the cave, which has a strong impact on seismic hazard assessment based on speleothems.

show abstract

Estimating An Upper Limit On Prehistoric Peak Ground Acceleration Using The Parameters Of Intact Speleothems In Caves In Southwestern Bulgaria

Gribovszki¹,

Paskaleva²,

Kostov³

et al.

Harmonization of Seismic Hazard in Vrancea Zone

View full text Add to dashboard Cite

Estimation of an upper limit on prehistoric peak ground acceleration using the parameters of intact speleothems in caves situated at the western part of Balkan Mountain Range, North-West Bulgaria

Cited by 9 publications

References 6 publications

Estimating the upper limit of prehistoric peak ground acceleration using an in situ, intact and vulnerable stalagmite from Plavecká priepast cave (Detrekői-zsomboly), Little Carpathians, Slovakia—first results

Estimating the upper limit of prehistoric peak ground acceleration using an in situ, intact and vulnerable stalagmite from Plavecká priepast cave (Detrekői-zsomboly), Little Carpathians, Slovakia—first results

Characterizing Stalagmites’ Eigenfrequencies by Combining In Situ Vibration Measurements and Finite Element Modeling Based on 3D Scans

Estimating An Upper Limit On Prehistoric Peak Ground Acceleration Using The Parameters Of Intact Speleothems In Caves In Southwestern Bulgaria

Contact Info

Product

Resources

About