Observations of long period Rayleigh wave ellipticity
نویسندگان
چکیده
منابع مشابه
Upper crustal azimuthal anisotropy across the contiguous U.S. determined by Rayleigh wave ellipticity
Constraints on upper crustal seismic anisotropy provide insight into the local stress orientation and structural fabric, but such constraints are scarce except in areas with dense recordings of local seismicity. We investigate directionally dependent Rayleigh wave ellipticity, or Rayleigh wave H/V (horizontal to vertical) amplitude ratios, between 8 and 20 s period across USArray to infer azimu...
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The depths and source mechanisms of nine large shallow earthquakes were determined from long-period (150 to 300 s) Rayleigh waves recorded by the Global Digital Seismograph Network (GDSN) and International Deployment of Accelerometers (IDA) networks. We inverted the data set of complex source spectra for a moment tensor (linear) or a double couple (nonlinear). By solving a least squares problem...
متن کاملProblem of Rayleigh Wave Propagation in Thermoelastic Diffusion
In this work, the problem of Rayleigh wave propagation is considered in the context of the theory of thermoelastic diffusion. The formulation is applied to a homogeneous isotropic thermoelastic half space with mass diffusion at the stress free, isothermal, isoconcentrated boundary. Using the potential functions and harmonic wave solution, three coupled dilatational waves and a shear wave is obt...
متن کامل3-D crustal structure of the western United States: application of Rayleigh-wave ellipticity extracted from noise cross-correlations
Fan-Chi Lin,1 Victor C. Tsai2 and Brandon Schmandt3 1Department of Geology and Geophysics, The University of Utah, Salt Lake City, UT 84112, USA. E-mail: [email protected] 2Seismological Laboratory, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA 3Department of Earth and Planetary Science, The University of New Mexico, Albuquerque, NM...
متن کاملJoint inversion of Rayleigh wave phase velocity and ellipticity using USArray: Constraining velocity and density structure in the upper crust
[1] Rayleigh wave ellipticity, or H/V ratio, observed on the surface is particularly sensitive to shallow earth structure. In this study, we jointly invert measurements of Rayleigh wave H/V ratio and phase velocity between 24–100 and 8–100 sec period, respectively, for crust and upper mantle structure beneath more than 1000 USArray stations covering the western United States. Upper crustal stru...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2007
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2006.03276.x