Results 11 to 20 of about 1,726,373 (224)
Seismic Gradiometry using Ambient Seismic Noise in an Anisotropic Earth [PDF]
Geophysical Journal International, 2017 We introduce a wavefield gradiometry technique to estimate both isotropic and anisotropic local medium characteristics from short recordings of seismic signals by inverting a wave equation. The method exploits the information in the spatial gradients of a seismic wavefield that are calculated using dense deployments of seismic arrays.
De Ridder, Sjoerd +1 more
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Reflection images from ambient seismic noise
Geophysics, 2009 Abstract One application of seismic interferometry is to retrieve the impulse response (Green's function) from crosscorrelation of ambient seismic noise. Various researchers show results for retrieving the surface-wave part of the Green's function. However, reflection retrieval has proven more challenging.
Draganov, D.S. (author) +4 more
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Wave field inversion of ambient seismic noise
Proceedings, 2017 We formulate a full wave field inversion for ambient seismic noise recorded by large and dense seismograph arrays. Full wave field inversion exploits the constraints on the gradients of the wave field that array data inherently possess (the sum is greater than its parts). Consequently, we can relax the spatial and temporal constraints on the wave field
De Ridder, S, Maddison, JR
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Seismic anisotropy from 6C ground motions of ambient seismic noise [PDF]
Journal of Geophysical Research: Solid EarthAbstractWe propose a new approach capable of measuring local seismic anisotropy from 6C (three‐component translation and three‐component rotation) amplitude observations of ambient seismic noise data. Our recent theory demonstrates that the amplitude ratio of 6C cross‐correlation functions (CCFs) enables retrieving the local phase velocity.
Tang, Le +3 more
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Comptes Rendus. Physique, 2021 Some properties of electromagnetic metamaterials have been translated, using some wave analogies, to surface seismic wave control in sedimentary soils structured at the meter scale.
Brûlé, Stéphane, Guenneau, Sébastien
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Introducing noisi: a Python tool for ambient noise cross-correlation modeling and noise source inversion [PDF]
Solid Earth, 2020 We introduce the open-source tool noisi for the forward and inverse modeling of ambient seismic cross-correlations with spatially varying source spectra.
L. Ermert +6 more
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Mapping the basement of the Cerdanya Basin (eastern Pyrenees) using seismic ambient noise [PDF]
Solid Earth, 2023 Ambient seismic noise acquired in the Cerdanya Basin (eastern Pyrenees) is used to assess the capability of different methodologies to map the geometry of a small-scale sedimentary basin.
J. Díaz +9 more
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Continuous isolated noise sources induce repeating waves in the coda of ambient noise correlations
Seismica, 2023 Continuous excitation of isolated noise sources leads to repeating wave arrivals in cross correlations of ambient seismic noise, including throughout their coda. These waves propagate from the isolated sources.
Sven Schippkus +2 more
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Spatial and temporal variation of the ambient noise environment of the Sikkim Himalaya
Scientific Reports, 2022 Ambient noise characteristics are perused to assess the station performance of 27 newly constructed broadband seismic stations across Sikkim Himalaya and adjoining Himalayan foreland basin, installed to study the seismogenesis and subsurface structure of
Mita Uthaman +6 more
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Seismica, 2023 Seismic imaging and monitoring of the near-surface structure are crucial for the sustainable development of urban areas. However, standard seismic surveys based on cabled or autonomous geophone arrays are expensive and hard to adapt to noisy ...
Rafał Czarny, Tieyuan Zhu, Junzhu Shen
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