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Toledo, Tania (author), Obermann, A. (author), Verdel, A. (author), Martins, Joana E. (author), Jousset, P. (author), Mortensen, A. K. (author), Erbas, Kemal (author), Krawczyk, C. M. (author)In autumn 2017 a network of 14 broadband seismic stations was deployed at the Theistareykir high temperature geothermal field (NE Iceland). This experiment was conducted as part of the current efforts to characterize the field's main structures, and possible short and long term stress variations due to the ongoing fluid injection and...journal article 2022
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- Verdel, Arie (author), Boullenger, Boris (author), Martins, Joana E. (author), Obermann, Anne (author), Toledo, Tania (author), Jousset, Philippe (author) abstract 2020
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- Martins, Joana E. (author), Obermann, Anne (author), Verdel, Arie (author), Jousset, Philippe (author) abstract 2020
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Weemstra, C. (author), De Laat, Janneke I. (author), Verdel, Arie (author), Smets, P.S.M. (author)Instrumental timing and phase errors are a notorious problem in seismic data acquisition and processing. These can be frequency independent, for example due to clock drift, but may also be frequency dependent, for example due to imperfectly known instrument responses. A technique is presented that allows both types of errors to be recovered...journal article 2020
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Verdel, Arie (author), Boullenger, Boris (author), Martins, Joana E. (author), Obermann, Anne (author), Toledo Zambrano, Tania (author), Jousset, Philippe (author)Integration of results from active seismic, passive seismic and well data reduces the uncertainties of several subsurface parameters that are of interest for cost-effective geothermal production operations in Los Humeros. In this study, we present results from the application of ambient noise seismic interferometry (ANSI) to retrieve zero-offset...conference paper 2019
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van IJsseldijk, J.E. (author), Ruigrok, Elmer (author), Verdel, Arie (author), Weemstra, C. (author)Global phases, viz. seismic phases that travel through the Earth?s core, can be used to locally image the crust by means of seismic interferometry. This method is known as Global Phase Seismic Interferometry (GloPSI). Traditionally, GloPSI retrieves low-frequency information (up to 1 Hz). Recent studies, however, suggest that there is high...journal article 2019
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Sánchez-Pastor, Pilar (author), Obermann, Anne (author), Schimmel, Martin (author), Weemstra, C. (author), Verdel, Arie (author), Jousset, Philippe (author)The Reykjanes Geothermal System (RGS) is a high-temperature geothermal system located on the Reykjanes peninsula, a transtensional plate-boundary zone located on the southwestern tip of Iceland. The area is characterized by high seismicity, recent volcanism, and high-temperature geothermal fields. We use seismic noise records from April 2014...journal article 2019
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Martins, Joana E. (author), Weemstra, C. (author), Ruigrok, Elmer (author), Verdel, Arie (author), Jousset, Philippe (author), Hersir, Gylfi (author)Tomographic imaging based on ambient seismic noise measurements has shown to be a powerful tool, especially in areas like Iceland, where the microseism illumination is excellent. In this paper, we produce a 3D S-wave tomographic image over the western Reykjanes Peninsula high-enthalpy geothermal fields and evaluate the reliability of the...journal article 2019
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Almagro Vidal, C. (author), van der Neut, J.R. (author), Verdel, Arie (author), Hartstra, I.E. (author), Wapenaar, C.P.A. (author)Passive seismic interferometry enables the estimation of the reflection response of the subsurface using passive receiver recordings at the surface from sources located deep in the Earth. Interferometric imaging makes use of this retrieved reflection response in order to study the subsurface. Successful interferometric imaging relies on the...journal article 2018
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Jousset, Philippe (author), Blanck, Hanna (author), Franke, Steven (author), Metz, M. (author), Águstsson, K. (author), Verdel, Arie (author), Ryberg, T. (author), Hersir, Gylfi Páll (author), Weemstra, C. (author), Bruhn, D.F. (author), Flovenz, Olafur G (author)We present tomographic results obtained around geothermal reservoirs using seismic data recorded both on-land Reykjanes, SW-Iceland and offshore along Reykjanes Ridge. We gathered records from a network of 83 seismic stations (including 21 Ocean Bottom Seismometers) deployed between April 2014 and August 2015. We obtain crustal velocity images...conference paper 2016
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Verdel, Arie (author), Wedemeijer, Harry (author), Paap, B (author), Vandeweijer, Vincent (author), Weemstra, C. (author), Jousset, Philippe (author), Franke, Steven (author), Blanck, Hanna (author), Águstsson, K. (author), Hersir, Gylfi Páll (author)We present results from the application of ambient noise seismic interferometry (ANSI) to data that were recorded continuously in 2014 and 2015 at Iceland’s peninsula Reykjanes. The objective of this study is the retrieval of reflected body waves (P-waves) that provide high-resolution velocity-versus-depth as well as subsurface structural...conference paper 2016
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Weemstra, C. (author), Obermann, Anne (author), Blanck, Hanna (author), Verdel, Arie (author), Paap, B (author), Guðnason, Egill Árni (author), Hersir, Gylfi Páll (author), Jousset, Philippe (author), Sigurðsson, Ömar (author)We report on the results obtained from a dense seismic deployment over a geothermal reservoir. The reservoir has been producing continuously for almost a decade and is located on the tip of the Reykjanes peninsula, SW Iceland. The seismic stations on top of the reservoir have continuously recorded the ambient seismic wavefield between April 2014...abstract 2016
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Weemstra, C. (author), Obermann, Anne (author), Verdel, Arie (author), Paap, B (author), Blanck, Hanna (author), Guðnason, Egill Árni (author), Hersir, Gylfi Páll (author), Jousset, Philippe (author), Sigurðsson, Ömar (author)We report on the results obtained from a dense seismic deployment over a geothermal reservoir located on the tip of the Reykjanes peninsula, SW Iceland. The available seismic stations have continuously recorded the ambient-seismic wave field between April 2014 and August 2015. Using seismic interferometry (SI), seismic responses were generated...abstract 2016
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- Boullenger, B. (author), Verdel, A. (author), Paap, B. (author), Thorbecke, J.W. (author), Draganov, D.S. (author) conference paper 2015
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Boullenger, B. (author), Verdel, A. (author), Paap, B. (author), Draganov, D.S. (author)Ambient-noise seismic interferometry (ANSI) applied to passive body-wave measurements retrieves an estimate of the reflection response as if from a source at a receiver position. Often, the limited compliance with theoretical assumptions causes erroneous absolute amplitudes of the retrieved physical reflections, and additional artefacts....conference paper 2015
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Boullenger, B. (author), Verdel, A. (author), Paap, B. (author), Thorbecke, J.W. (author), Draganov, D.S. (author)Seismic interferometry applied to ambient-noise measurements allows the retrieval of the seismic response between pairs of receivers. We studied ambient-noise seismic interferometry (ANSI) to retrieve time-lapse reflection responses from a reservoir during CO2 geologic sequestration, using the case of the experimental site of Ketzin, Germany. We...journal article 2015
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- Verdel, S. (author) master thesis 2014
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Draganov, D.S. (author), Campman, X. (author), Thorbecke, J.W. (author), Verdel, A. (author), Wapenaar, C.P.A. (author)The successful surface waves retrieval in solid?Earth seismology using long?time correlations and subsequent tomographic images of the crust have sparked interest in extraction of subsurface information from noise in the exploration seismology. Subsurface information in exploration seismology is usually derived from body?wave reflections >?1?Hz,...journal article 2013
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- Boullenger, B. (author), Verdel, A. (author), Thorbecke, J.W. (author), Draganov, D.S. (author) conference paper 2013
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Arts, R.J. (author), Zhang, X. (author), Verdel, A.R. (author), Santonico, D. (author), Meekes, J.A.C. (author), Noorlandt, R.P. (author), Paap, B.F. (author), Vandeweijer, V.P. (author)Since July 2008, CO2 is injected into a saline aquifer near the town of Ketzin in Germany. For monitoring the CO2- migration close to the injection well, TNO installed a fixed 2D seismic array of 120 meters length in 2009, with 3- component geophones at the surface, 4-component receivers at 50 meters depth and a central vertical array of 4-...journal article 2013
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