Acta Geodynamica et Geomaterialia

Title: MAPPING THE RESONANT FREQUENCIES OF UPPER GEOLOGICAL LAYERS IN THE VICINITY OF ABANDONED MINING PIT AT THE ZLATE HORY LOCALITY, NORTHERN MORAVIA
Authors: Lednická Markéta, Kaláb Zdeněk and Gyori Erzsébet
DOI: 10.13168/AGG.2015.0013
Journal: Acta Geodynamica et Geomaterialia, Vol. 12, No. 2 (178), Prague 2015
Full Text: PDF file (3.3 MB)
Keywords: seismic noise, spectral ratio, site effect, mining pit, seismic refraction measurement
Abstract: Determination of resonant frequencies of sedimentary layers using measurement of seismic noise has been a widely used technique in the last years. Together with the data from geophysical measurement, borehole documentation and geotechnical properties of soils, it can help to understand geological formation at investigated localities. Mapping resonant frequencies of upper geological layers in the locality of Zlaté Hory is presented in this paper. This study follows from the results of seismological measurement performed in the locality during a winding tower demolition in the year 2011. Significant harmonic vibrations were recorded in the vicinity of the tower during the demolition and a new question arose: “What is the source of those harmonic vibrations?” Although there are not any typical sedimentary layers in the locality, based on the results of seismic noise measurements, resonant frequencies of upper geological structures were determined and analysed together with the results of geophysical measurements and borehole documentation.