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Draganov, D.S. (author), Ma, X. (author), Buisman, M. (author), Kiers, Tjeerd (author), Heller, H.K.J. (author), Kirichek, Alex (author)In ports and waterways, the bathymetry is regularly surveyed for updating navigation charts ensuring safe transport. In port areas with fluid-mud layers, most traditional surveying techniques are accurate but are intrusive and provide one-dimensional measurements limiting their application. Current non-intrusive surveying techniques are less...book chapter 2021
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Ma, X. (author), Kirichek, Alex (author), Shakeel, A. (author), Heller, H.K.J. (author), Draganov, D.S. (author)The velocities of the seismic waves propagating in the fluid-mud layer are governed by the rheological properties and density of the fluid mud. Performing seismic transmission measurements inside the fluid mud can give good estimates of the seismic velocities and, thus, of the rheological properties and density. Laboratory ultrasonic...journal article 2021
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Liu, J. (author), Draganov, D.S. (author), Ghose, R. (author), Bourgeois, Q. (author)Detecting small-size objects is a primary challenge at archaeological sites due to the high degree of heterogeneity present in the near surface. Although high-resolution reflection seismic imaging often delivers the target resolution of the subsurface in different near-surface settings, the standard processing for obtaining an image of the...journal article 2021
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Shirmohammadi, F. (author), Draganov, D.S. (author), Hatami, Mohammad Reza (author), Weemstra, C. (author)Seismic interferometry (SI) refers to the principle of generating new seismic responses using crosscorrelations of existing wavefield recordings. In this study, we report on the use of a specific interferometric approach, called seismic interferometry by multidimensional deconvolution (SI by MDD), for the purpose of retrieving surface-wave...journal article 2021
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Janssen, M.T.G. (author), Barnhoorn, A. (author), Draganov, D.S. (author), Wolf, K.H.A.A. (author), Durucan, Sevket (author)As part of a seismic monitoring project in a geothermal field, where the feasibility of re-injection and storage of produced CO<sub>2</sub> is being investigated, a P-and S-wave seismic velocity characterisation study was carried out. The effect of axial (up to 95 MPa) and radial (up to 60 MPa) stress on the seismic velocity was studied in...journal article 2021
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Chamarczuk, Michał (author), Malinowski, Michał (author), Draganov, D.S. (author)Despite the unrivalled spatial resolution and depth penetration of active-source seismic methods used for mineral exploration in hardrock environment, economic and environmental restrictions (e.g., source permitting) may preclude its full-scale application. In such a case, 2D passive reflection seismics can be considered a cost-effective way...journal article 2021
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Slob, E.C. (author), Draganov, D.S. (author), Eltayieb, M.F.M.I. (author), Drijkoningen, G.G. (author), Werthmüller, D. (author), Ghose, R. (author)Difficulties in detecting and characterising shallow objects close the surface with seismic shear waves are often problematic because of dominant surface waves. By sequencing a specific combination of two data driven processing steps followed by diffraction tomography can overcome these problems. Small scattering objects become visible in the...conference paper 2021
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Shirmohammadi, F. (author), Draganov, D.S. (author), Wapenaar, C.P.A. (author)Seismic interferometry (SI) is a principle for retrieving responses between two receivers using cross-correlation. After the retrieval, one of the receivers acts as a virtual seismic source whose response is retrieved at the second receiver. Correct response retrieval relies on assumptions, among other, of a lossless medium being illuminated...poster 2020
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Casas, José Augusto (author), Badi, Gabriela Alejandra (author), Franco, Luis (author), Draganov, D.S. (author)The Planchón-Peteroa Volcanic Complex (PPVC) is located in the Central Andes, Argentina-Chile. Even though this active volcanic system is considered one of the most dangerous volcanoes in the region, with more than twenty modest (VEI < 4) Holocene eruptions, knowledge of its subsurface structures, internal processes, dynamics, and their...journal article 2020
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Nishitsuji, Y. (author), Ruigrok, Elmer (author), Draganov, D.S. (author)The characterization of the megaregolith on the Moon has been investigated in various ways including analysis of lunar meteorites, remote sensing of mineralogy and gravity, and deriving a seismic velocity profile. In this study, we propose a method for analyzing azimuthal anisotropy of the megaregolith. We call this method deep-moonquake...journal article 2020
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Balestrini, F.I. (author), Draganov, D.S. (author), Malehmir, Alireza (author), Marsden, Paul (author), Ghose, R. (author)In mineral exploration, new methods to improve the delineation of ore deposits at depth are in demand. For this purpose, increasing the signal-to-noise ratio through suitable data processing is an important requirement. Seismic reflection methods have proven to be useful to image mineral deposits. However, in most hard rock environments,...journal article 2020
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- Malehmir, Alireza (author), Manzi, Musa (author), Draganov, D.S. (author), Weckmann, Ute (author), Auken, Esben (author) contribution to periodical 2020
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- Shirmohammadi, F. (author), Weemstra, C. (author), Draganov, D.S. (author), Wapenaar, C.P.A. (author) poster 2019
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Casas, J. A. (author), Draganov, D.S. (author), Badi, G. A. (author), Manassero, M. C. (author), Olivera Craig, V. H. (author), Franco Marín, L. (author), Gómez, M. (author), Ruigrok, E. (author)Although the Planchón-Peteroa Volcanic Complex (PPVC) has undergone many hazardous eruptions, only a small number of geological, geochemical, and geophysical studies have been performed to describe this active volcanic system. In order to characterize the subsurface structures present at the PPVC, we applied seismic interferometry to fracture...journal article 2019
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Martins, Joana E. (author), Ruigrok, Elmer (author), Draganov, D.S. (author), Hooper, A. (author), Hanssen, R.F. (author), White, R.S. (author), Soosalu, Heidi (author)Torfajökull volcano, Iceland, has not erupted since 1477. However, intense geothermal activity, deformation, and seismicity suggest a long‐lasting magmatic system. In this paper, we use ambient noise tomography to image the magmatic system beneath Torfajökull volcano. One hundred days of ambient noise data from 23 broadband seismometers show the...journal article 2019
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Nishitsuji, Y. (author), Marín, Luis Franco (author), Gomez, Martín (author), Rowe, C.A (author), Draganov, D.S. (author)No conclusive evidence has been presented to date for tectonic tremor (TT) in the vicinity of central Chile, where the Nazca Plate is subducting beneath the South American Plate. Subduction in our experimental location (roughly 35.5° S, 70.5° W) is steep and fairly unobstructed compared to the flattened and more seismogenic behavior to the north...journal article 2019
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Polychronopoulou, Katerina (author), Lois, Athanasios (author), Draganov, D.S. (author)As the global need for mineral resources is constantly rising and the exploitable concentrations of these resources tend to become increasingly complex to explore and exploit, the mining industry is in a constant quest for innovative and cost‐effective exploration solutions. In this context, and in the framework of the Smart Exploration action,...journal article 2019
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Chamarczuk, M. (author), Malinowski, M. (author), Nishitsuji, Y. (author), Thorbecke, J.W. (author), Koivisto, E. (author), Heinonen, S. (author), Juurela, S. (author), Mężyk, M. (author), Draganov, D.S. (author)The main issues related to passive-source reflection imaging with seismic interferometry (SI) are inadequate acquisition parameters for sufficient spatial wavefield sampling and vulnerability of surface arrays to the dominant influence of the omnipresent surface-wave sources. Additionally, long recordings provide large data volumes that...journal article 2019
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Polychronopoulou, K. (author), Lois, A. (author), Martakis, N. (author), Calassou, S. (author), Draganov, D.S. (author)Passive seismic surveys have long been applied in the context of exploration studies. Our research focuses on the exploitation of the natural seismicity that is present in passive seismic records and the extraction of useful information of the subsurface from different parts of the earthquake signal. In that scope, we initially install a dense...conference paper 2019
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Andrés, Juvenal (author), Draganov, D.S. (author), Schimmel, Martin (author), Ayarza, Puy (author), Palomeras, Imma (author), Ruiz, Mario (author), Carbonell, Ramon (author)The Spanish Central System is an intraplate mountain range that divides the Iberian Inner Plateau in two sectors – the northern Duero Basin and the Tajo Basin to the south. The topography of the area is highly variable with the Tajo Basin having an average altitude of 450–500 m and the Duero Basin having a higher average altitude of 750–800 m....journal article 2019