Coda waves’ tomography for surficial exploration
نویسندگان
چکیده
منابع مشابه
Phase statistics of seismic coda waves.
We report the analysis of the statistics of the phase fluctuations in the coda of earthquakes recorded during a temporary experiment deployed at Pinyon Flats Observatory, California. The observed distributions of the spatial derivatives of the phase in the seismic coda exhibit universal power-law decays whose exponents agree accurately with circular Gaussian statistics. The correlation function...
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The propagation of classical waves in the presence of a disordered medium is studied. We consider wave pulses containing a broad range of frequencies in terms of the configurationally averaged Green function of the system. Damped oscillations in the time-dependent response trailing behind the direct arrival of the pulse (coda) are predicted, the periods of which are governed by the density of s...
متن کاملAnalyzing the coda from correlating scattered surface waves.
The accuracy of scattered Rayleigh waves estimated using an interferometric method is investigated. Summing the cross correlations of the wave fields measured all around the scatterers yields the Green's function between two excitation points. This accounts for the direct wave and the scattered field (coda). The correlations themselves provide insights into the location of the scatterers, as we...
متن کاملConstruction of Empirical Green’s Functions from Direct Waves, Coda Waves, and Ambient Noise in Se Tibet
Empirical Green’s functions (EGFs) between receivers can be obtained from seismic interferometry through cross-correlation of pairs of ground motion records. Full reconstruction of the Green’s function requires diffuse wavefields or a uniform distribution of (noise) sources. In practice, EGFs differ from actual Green’s functions because wavefields are not diffuse and the source-distribution not...
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Vascular exploration of small animals requires imaging hardware with a very high spatial resolution, capable of differentiating large as well as small vessels, in both in vivo and ex vivo studies. Micro Computed Tomography (micro-CT) has emerged in recent years as the preferred modality for this purpose, providing high resolution 3D volumetric data suitable for analysis, quantification, validat...
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ژورنال
عنوان ژورنال: Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
سال: 2015
ISSN: 2382-4980,0370-3908
DOI: 10.18257/raccefyn.184