Print Email Facebook Twitter Towards adapting reverse vertical seismic profiling for ambient-noise imaging with transient sources Title Towards adapting reverse vertical seismic profiling for ambient-noise imaging with transient sources: Automatic estimation of stationary-phase receivers for improved retrieval of the interferometric Green's function Author Chamarczuk, Michał (Rice University) Draganov, D.S. (TU Delft Applied Geophysics and Petrophysics) Quiros, Diego (University of Cape Town) Malinowski, Michał (Institute of Geophysics PAS; Geological Survey of Finland) Date 2022-11-01 Abstract Most of the ambient-noise studies are performed with sensor arrays located at the surface. Passive recordings containing seismic arrivals from subsurface sources could be seen as having a geometry resembling reverse vertical seismic profiling (RVSP). In such scenarios, the intersource seismic-interferometry technique can be used to redatum the surface receivers to the subsurface source positions resulting in virtual shot gathers at depth. The success of the interferometric processing primarily requires that a correlation panel created in the interferometric process contains stationary-phase regions that, when summed, retrieve events with correct timing, whereas nonstationary contributions are canceled. We have addressed the combination of the RVSP configuration and ambient-noise measurements. We develop a prototype of a data-driven technique allowing us to adapt the summation process such that changes in the stationary-phase requirements imposed by changes in the noise-sources distribution can be adaptively satisfied without the need for array redeployment. We develop to identify the receivers located in the stationary-phase regions by scanning for stationary contributions in the correlation panel prior to stacking. Our method uses the correlation coefficient and time windowing to distinguish between stationary and nonstationary arrivals. The improved Green's function estimate is obtained by limiting the summation to only those receivers that, when summed, enhance the stationary and attenuate the nonstationary contributions. We test this using a simple 2D numerical example to find a practical way to alleviate insufficient receiver coverage. We determine the theoretical possibility to improve the intersource Green's function estimates without explicit knowledge of the target and the source distribution. However, our data-driven approach has the disadvantage of being limited to scenarios in which the correlation panel from all receivers contains identifiable stationary-phase arrivals. Subject imaginginterferometrypassive seismicprocessing To reference this document use: http://resolver.tudelft.nl/uuid:5ecd8e06-d6a6-4937-b725-3649eb2165c4 DOI https://doi.org/10.1190/geo2021-0293.1 Embargo date 2023-07-01 ISSN 0016-8033 Source Geophysics, 87 (6), 169-182 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2022 Michał Chamarczuk, D.S. Draganov, Diego Quiros, Michał Malinowski Files PDF geo2021_0293.1.pdf 11.8 MB Close viewer /islandora/object/uuid:5ecd8e06-d6a6-4937-b725-3649eb2165c4/datastream/OBJ/view