A5072260570- Geophysical and Geoelectrical Methods
- Geophysics and Gravity Measurements
- Geophysical Methods and Applications
- Geological Formations and Processes Exploration
- Geomagnetism and Paleomagnetism Studies
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Image Processing and 3D Reconstruction
- GNSS positioning and interference
- Inertial Sensor and Navigation
- earthquake and tectonic studies
- Maritime and Coastal Archaeology
- Ancient and Medieval Archaeology Studies
- 3D Surveying and Cultural Heritage
- Historical and Archaeological Studies
- Statistical and numerical algorithms
- Reservoir Engineering and Simulation Methods
- Geochemistry and Geologic Mapping
- Geological formations and processes
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Planetary Science and Exploration
- Geological and Geophysical Studies
- Earthquake Detection and Analysis
- Marine and environmental studies
Comenius University Bratislava
2016-2025
Earth Science Institute of the Slovak Academy of Sciences
2011
Slovak Academy of Sciences
2011
University of Naples Federico II
2006
G-trend (Slovakia)
2006
Enhancing the detection accuracy of edges geological features within subsurface remains a significant objective in geophysical data interpretation. Despite numerous advancements, approaches stemming from directional gradients gravity and magnetic fields still grapple with challenges such as low-resolution outcomes susceptibility to noise contamination. In this study, we introduce novel filtering framework based on total horizontal gradient its derivatives, designed yield more precise...
Abstract. The AlpArray Gravity Research Group (AAGRG), as part of the European program, focuses on compilation a homogeneous surface-based gravity data set across Alpine area. In 2017 10 countries in realm agreed to contribute with for new field an area spanning from 2 23∘ E and 41 51∘ N. This relies existing national databases and, Ligurian Adriatic seas, shipborne Service Hydrographique et Océanographique de la Marine Bureau Gravimétrique International. Furthermore, Ivrea zone Western...
ABSTRACT Evaluation of higher derivatives (gradients) potential fields plays an important role in geophysical interpretation (qualitative and/or quantitative), as has been demonstrated many approaches and methods. On the other hand, numerical evaluation is unstable process – it tendency to enlarge noise content original data (to degrade signal‐to‐noise ratio). One way stabilize derivative utilization Tikhonov regularization. In submitted contribution we present derivation regularized filter...
Abstract The city of Iznik, called Nikaia or Nicaea in ancient times, is located northwest Anatolia, Turkey. renowned especially for the first Council convened by Roman emperor Constantine ad 325 an attempt to unify Church. During international field course on geophysical exploration archaeological targets we detected remains a small previously unknown Byzantine church fallow lot land inside city. oriented parallel Hippodamian street grid that deviates from modern system quarter ~45°. We...
The methods used for differentiation of potential field data play an important role in interpretation, as various derivatives are included many the transformations often when interpreting such (e.g.: Analytical Signal, Tilt Angles, Total Gradient and others). However, evaluation horizontal vertical is unstable process. possible (partial) answer to this instability Tikhonov regularization based on incorporating additional property representing maximum smoothness, which typically obtained by...
Standard Euler deconvolution is applied to potential-field functions that are homogeneous and harmonic. Homogeneity necessary satisfy the equation itself, whereas harmonicity required compute vertical derivative from data collected on a horizontal plane, according theory. The analytic signal modulus of potential field function but not harmonic function. Hence, incorrect when computed by usual techniques for so also consequent deconvolution. We show resulting errors primarily affect...
We analyze gravitational effects of distant topographic and bathymetric relief beyond the (earth-centered) angular distance [Formula: see text] (i.e., outer limit Hayford-Bowie zone O, or approximately text]) using a spherical earth model. Our results support current procedures that neglect for most local gravity surveys but show their potential importance continental- global-scale surveys. The can produce horizontal gradients as large text]. In mountainous areas, effect is significant, even...
ABSTRACT The ruins of the St Catherine's monastery complex, largest sacral in Slovakia, are an important example Slovak cultural heritage. Franciscan was a famous site religious significance due to legends describing apparitions Catherine. preservation project remains started 1994. As part this project, complex historical, archaeological, anthropological and geophysical research has been conducted at since 1997. Microgravity ground‐penetrating radar (GPR) surveys were carried out nave former...
The use of microgravity technique in archaeology: A case study from the St. Nicolas Church Pukanec, Slovakia detection subsurface cavities, such as crypts, cellars and tunnels, churches castles belongs to successful applications employment surface gravity measurement techniques archaeo-prospecting. old historic building exploration requires using non-invasive methods, hence is a proper candidate for this task. On Roman-Catholic town Pukanec results delineation local density variations caused...
The estimation of the structural index and depth to source is main task many popular methods used analyze potential field data, such as Euler deconvolution. However, these estimates are unstable even in presence a weak amount noise, deconvolution noisy data leads an underestimation depth. We have studied how affected by applying low-pass filtering data. Physically based filters, upward continuation integration, been shown be best choice over range altitudes (upward continuation) or orders...
Abstract Detailed and precise measurement of the Earth's gravity field (microgravity method) can be effectively used for detection quantification subsurface voids and/or cavities. There exist a variety successful applications microgravity method in near surface geophysics, namely geotechnical, environmental archaeological prospection. Using state‐of‐the‐art ‘microgal’ relative meters, cavities several metres each dimension (positioned at similar depth) detected interpreted. Such objects...
A complex of geophysical methods were used to investigate a small karst area aimed at the production detailed geological mapping, confirm localization known sinkholes, and find possible continuations caves voids below surface.The dipole electromagnetic profiling radiometric mapping (the gamma-ray spectrometry method) applied determine spatial distribution hard carbonate rocks weathered valley-fill sediments.Detailed high-definition magnetometry was carried out selected sites in studied...
We present a new digital Moho depth map of the Carpathian-Pannonian region. The was produced by compiling discontinuity data, which were obtained interpretation seismic measurements taking into account results 2-D and 3-D integrated geophysical modelling. resultant is characterized significant Moho-depth variations. trends features in this region correlated with tectonic units.
ABSTRACT The founder of the Russian school direct interpretation potential fields (with minimal prior geological‐geophysical information) was V.M. Berezkin, who introduced operator total normalized gradient for 2D profile gravity data sets. This successfully applied in searches hydrocarbon reservoirs. further development this approach (the so‐called quasi‐singular points method) has allowed solution also to various structural problems, using mathematical criteria transition from extremes...
ABSTRACT Use of the microgravity technique for cavity detection in exploration historical buildings requires careful data acquisition and modern processing procedures. We have developed a new method calculation building effects, where geodetic measurements special photogrammetric software are used. In our approach, three‐dimensional polyhedral model an is created from images using Eos System‐s PhotoModeler Scanner software. A comparison equations gravitational effect bodies presented on...
The gravitational effect of the topography and near-building structures their contribution on vertical gradient gravity (VGG) was studied. strong impact near VGG values found in case mountainous areas – deviations up to 88% normal value were obtained by means relative measurements selected parts Slovakia. Newly developed software a high-quality detailed digital terrain model Slovakia used for evaluation topographical effect. estimated simple 3D bodies approximation, i.e., rectangular or...
A detailed gravity survey with 235 measurements was carried out at the King Fahd University of Petroleum and Minerals campus, which is located crest oil-bearing Dammam Dome (Eastern Province Saudi Arabia). This allows us to better understand geometry underlying its tectonic regime. The acquired data were processed using conventional reduction techniques. effectiveness terrain correction evaluated several recently developed algorithms. Afterward, subject geophysical filters for edge detection...
<abstract> <p>Gravimetry is a discipline of geophysics that deals with observation and interpretation the earth gravity field. The acquired data serve study interior, be it deep or near surface one, by means inferred subsurface structural density distribution. structure resolved solving gravimetric inverse problem. Diverse methods approaches exist for this non-unique ill-posed Here, we focused on those do not pre-constrain number geometries sources. We reviewed historical...