Crystal anisotropy receiver function
WebSep 15, 2014 · Mapping seismic anisotropy using harmonic decomposition of receiver functions: An application to Northern Apennines, Italy. [1] Isotropic and anisotropic … WebJun 1, 1997 · Abstract Radial and transverse teleseismic receiver functions (RFs) at GSN station ARU, in central Eurasia, display variation in back-azimuth ψ consistent with a 1-D anisotropic crustal structure. In a broad ψ range, the transverse RFs possess a strong phase at ∼5-sec delay relative to direct P, with a polarity reversal at ψ ∼ 50°.
Crystal anisotropy receiver function
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WebIn recent years, P -to- S (or Ps) receiver functions (RFs) have been widely used to resolve complex media, such as dipping interfaces and layered anisotropy. Receiver functions represent P -to- S conversions at seismic discontinuities and can be expressed into a radial and a transverse component (Langston 1977; Vinnik 1977 ). Webextracted by receiver function analysis, is now widely used in measuring seismic anisotropy in the crust. In general, this con-version wave is registerd as a very weak signal in individual receiver functions. Making robust measurement of crust aniso-tropy with such a weak signal can be extremely difficult and dangerous.
WebIn general, to interpret the origin of the anisotropy derived from receiver function analysis, the type of symmetry (fast or slow) has to be estimated in view of geological or …
WebApr 18, 2024 · While upper crustal anisotropy can be characterized using splitting of direct S waves from local earthquakes, one of approaches for the characterization of anisotropy … WebMay 25, 2024 · We find that S–P receiver functions have the potential to constrain anisotropy at depth via the back-azimuth variation of Sp-phase amplitude on the vertical component. We conclude that practical use of S receiver functions to investigate anisotropy will depend on accurate determination of the initial S-wave polarization.
WebThis study investigates the seismic structure and anisotropy in the crust beneath Madagascar and southeastern Africa, using receiver functions. The understanding of seismic anisotropy is essential for imaging past and present deformation in the lithosphere–asthenosphere system. In the upper mantle, seismic anisotropy mainly …
WebReceiver- function analysis allows the separation of crustal from mantle Published by Copernicus Publications on behalf of the European Geosciences Union. 1802 M. J. Schmidtke et al.: Elastic anisotropies of rocks in a subduction and exhumation setting anisotropy in the Alps (Link and Rümpker, 2024). description of ankle sprainWebSep 15, 2014 · The receiver function analysis technique isolates teleseismic mode conversions originating at velocity contrasts beneath a seismic station. We show that dipping isotropic contrasts as well as small (<10%) anisotropy generate first-order (i.e. Moho-sized) arrivals in receiver functions. chs inc mitchell sdWebCrystalline Anisotropy. Crystalline anisotropy can be defined through a tensor as follows: [2] which will depend on details of the electronic band structure and the underlying crystal … description of ankle jointWebHere S 1111 α is the overall directional compliance expressed in a system where the axis 1 is along the tensile direction. Two factors affect the variation of E with α: the single … chs inc linkedinWebJun 1, 1997 · Receiver functions are derived from teleseismic waves recorded during the 1988 to 1989 PASSCAL Basin and Range passive-source seismic experiment in northwestern Nevada. A velocity model involving both a planar dipping Moho and crustal anisotropy is needed to explain the radial and tangential motions of the observed P S … description of an introvertWebOct 1, 2024 · The crustal anisotropy mainly develops due to structural features such as faults, layering, flat mineral alignment, and regularly oriented cracks in the upper crust (e.g., Crampin, 1981; Mainprice et al., 2000; Boness and Zoback, 2006; Brownlee et al., 2024 ). chs inc minneapolisWebMar 10, 2024 · We report a study using teleseismic P-wave receiver functions to infer the orientation of the maximum horizontal principal stress from the direction of upper crustal shear-wave velocity anisotropy. We apply an inverse approach using the Neighborhood Algorithm to conduct a nonlinear search, attaining a best-fitting crustal model that … chs inc naics code