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  • 1
    Series available for loan
    Series available for loan
    Mining and environmental geophysics : selected and revised contributions to the XXX Polish-Czech-Slovakian Symposium held at L½adek Zdrój on June 6-8, 2005 (2006)
    Warszawa : Inst. Geofizyki Polskiej Akad. Nauk
    Associated volumes
    Details Availability
    Call number: S 91.0236(M-29) / Regal 35
    In: Publications of the Institute of Geophysics, Polish Academy of Sciences
    Type of Medium: Series available for loan
    Pages: 310 S.
    ISBN: 8388765671
    Series Statement: Publications of the Institute of Geophysics, Polish Academy of Sciences : M, Miscellanea 29 = 395
    Classification:
    Geophysical Exploration, Geophysical Prospecting
    Location: Magazine - must be ordered
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    Fractal dimension of faults network in the upper silesian coal basin (Poland): Preliminary studies (1996)
    Springer
    Pure and applied geophysics 147 (1996), S. 239-247 
    Details
    ISSN: 1420-9136
    Keywords: Fractal dimension ; faults ; cool basin ; Poland
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Fractal analysis of faults network, tremor foci spatial distribution as well as the Gutenberg-Richter relationship could further explain whether the biggest seismic events are connected with recent tectonic activity. Fractality of fault systems geometry, as a first step of the analysis, was tested fro a part of the USCB embodying the main structural units. The cluster analysis and the box counting methods were employed. The calculated fractal dimension of fault network was 1.98 for the whole area yet for considered structural units it was close to 1.6. The results point to similarity of studied fault pattern to river network. Faults within selected tectonic units make separate sets which have a distinct geometry and origin. The value of 1.6 is an upper limit to the fracture geometry of rocks that can be explained on the basis of Griffith energy balance concept.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00877480
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A Study of Spatial Distribution of Induced Seismicity in the Upper Silesian Coal Basin (1999)
    Springer
    Natural hazards 19 (1999), S. 97-105 
    Details
    ISSN: 1573-0840
    Keywords: Upper Silesia ; coal basin ; induced seismicity ; spatial distribution of seismic activity ; fractals
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The Upper Silesian Coal Basin (USCB) is a region where high seismic activity is observed. Most of these seismic events have a local magnitude not exceeding 2.3. Their location and type of focal mechanism suggest that they are connected with new discontinuities in the rock mass caused by mining activity. Shocks with higher magnitude are also observed but their frequency is much lower. The strong events have a different focal mechanism than the low energetic events. The spatial distribution of shock epicentres is not uniform in the USCB area and shows the fractal character of seismic phenomena. Despite extensive mining activity throughout the area, the epicentres of strong events are concentrated in four regions belonging to different geological units. The temporal variability of epicentre co-ordinates and the general decrease of seismic activity points to the migration of seismicity across the investigated area. Analysing the spatial and temporal distributions of the strongest shocks, one can suppose this area to be critically self-organised. These facts suggest that induced seismicity in the USCB is triggered by a nonlinear dynamic process, having regional character and connected with recent tectonic activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008089931203
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  • 4
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    Study on energy distributions of strong seismic events in the USCB (2017)
    De Gruyter
    Details
    Publication Date: 2017-06-01
    Description: The paper presents the statistical analysis of energy distribution of strong seismic shocks (energy E ≥ 105 J) occurred in the Upper Silesian Coal Basin which is one of the most seismically active mining areas in the world. In the USCB tremor epicenters do not occur uniformly throughout the whole basin but group in several regions belonging to different structural units and are separated by regions where strong shocks are not observed. The aim of the studies was to determine the modality of the energy distributions and to compare the modal types in regions of the USCB where the shocks epicenters cluster. An analysis was made for shocks with energies equal to or greater than 105 J recorded by Upper Silesian Regional Seismological Network operated by Central Mining Institute (CMI), which took place between 1987 – 2012. The analysis has proven the bimodality of seismic energy distribution in the three of five studied areas of the Upper Silesian Coal Basin. The Gumbel’s distribution II type best fit the experimental energy distribution for almost all studied tectonic units except the main syncline area, where the Gumbel’s distribution I type matched better the low-energy mode. This is due to too short time window, causing a shortage of the strongest shocks in seismic catalogue.
    Print ISSN: 2084-5707
    Electronic ISSN: 2299-8179
    Topics: Geosciences
    Published by De Gruyter
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  • 5
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    Fractal dimension of faults network in the upper silesian coal basin (Poland): Preliminary studies (1996)
    Springer
    Details
    Publication Date: 1996-07-01
    Print ISSN: 0033-4553
    Electronic ISSN: 1420-9136
    Topics: Geosciences , Physics
    Published by Springer
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  • 6
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    Unification of data from various seismic catalogues to study seismic activity in the Carpathians Mountain arc (2019)
    De Gruyter
    Details
    Publication Date: 2019-11-30
    Description: The Carpathian Mountainsarc is the most seismically active area in Central Europe. Analysis of the seismicity of entire Carpathian arc requires data from each of the particular catalogues which have to be properly and uniformly entered, standardized and merged. For our study we first had to prepare a database of seismic events (ML ≥ 1.6) compiled from the data of earthquakes taken from individual national seismic networks as well as data from international seismic centers. However, a careful review of these catalogues has uncovered significant inconsistencies, particularly discrepancies in the description of the location, magnitude and completeness of seismic events. To address these inconsistencies, a newly created compound earthquake catalogue was compiled from the aforementioned seismic catalogues and included events that occurred in the Carpathian Mountains arc area between 1976 and 2017. This work is intended to point out some of the problems associated with collecting data from various seismic catalogues as well as the need for their very careful verification, in order to create a uniform set of seismic data across a large area spanning numerous countries. The results suggest that compiling a uniform and dependable earthquake catalogue is crucial for reliable seismic studies.
    Electronic ISSN: 2391-5447
    Topics: Geosciences
    Published by De Gruyter
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  • 7
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    Uncertainty based multi-step seismic analysis for near-surface imaging (2019)
    De Gruyter
    Details
    Publication Date: 2019-11-09
    Description: Near-surface seismic surveys are often designed for surface wave and seismic tomographic analysis. In recent years, seismic imaging methods have been more frequently used at this scale. Recognition of near-surface structures using a single method is insufficient because of the ambiguity of the inversion problem. As a solution, the authors propose a multi-step approach, where several different seismic methods are used in a particular order, to achieve an optimal model. A multi-method approach allows utilisation of a whole spectrum of recorded data, even the elements that are treated as background noise in other techniques. In classical processing approach, information about data uncertainty is often omitted or used in the simplest way for the single method only. This work presents an updated approach to uncertainty analysis by transferring estimated uncertainty between processing steps. By assuming that every consecutively applied method is more certain, the authors were able to obtain accurate velocity fields for seismic imaging, as the main information received from the previous steps. Based on information from multiple methods, a seismic stack in the depth domain was created as a final result, with an estimate of uncertainty.
    Electronic ISSN: 2391-5447
    Topics: Geosciences
    Published by De Gruyter
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  • 8
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    Ground-motion prediction equation and site effect characterization for the central area of the Main Syncline, Upper Silesia Coal Basin, Poland (2018)
    De Gruyter
    Details
    Publication Date: 2018-09-14
    Description: The aim of the study was to find the best model of ground-motion prediction equation (GMPE) forecasting peak ground acceleration (PGA) caused by induced seismicity. The maximum values of PGA on the surface are a major seismic threat for the infrastructure, especially in the highly urbanized areas, such is the Upper Silesian Metropolitan Area. The forecasting equations were estimated based on the values of PGA, epicenter distances and mining tremor energy registered by 14 surface seismometer stations located in the central area of the Main Syncline of the Upper Silesia Coal Basin. Data were collected within the period from January 2010 to December 2016, and the total number of seismic events used in the calculations was 15 541. The final model predicted the PGA values and amplification coefficients representing the characteristics of the site effects under seismometer stations.
    Electronic ISSN: 2391-5447
    Topics: Geosciences
    Published by De Gruyter
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