Depth sensitivity kernels for Rayleigh waves
Sensitivity of ionosonde detection of atmospheric disturbances induced by seismic Rayleigh waves at different latitudes
... The calculations were conducted for I = 45 and 72 ◦ cor- responding to Yamagawa and Kazan, respectively. The unperturbed electron density profile prior to the application of acoustic waves was obtained by ...
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A study of Rayleigh waves in south western and eastern USA
... surface waves to explain the structure of the crust and upper mantle has developed ...Surface waves sample the elastic properties of the lithosphere between the earthquake epicentre and the recording ...
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Amplification of gravity and Rayleigh waves in a layered water soil model
... and depth all play an important role in generation ...of Rayleigh wave, the spectral amplitude decreases monotonously, with as the increase of focal ...
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Non linear enhancement of laser generated ultrasonic Rayleigh waves by cracks
... the material itself and the boundary conditions are significantly different to those when the source is entirely on the surface of the sample, well away from an edge. Machined slots are often used to simulate surface ...
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Effect on Reflection of Rayleigh Waves due to Size of Plane Barrier in Shallow Ocean
... compressional waves due to a rigid barrier in the surface of a deep sea-water and in an ocean superimposed on a solid half space has been studied by Deshwal [3, 4] using the technique of Wiener and ...of ...
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In plane and out of plane measurements of Rayleigh waves using EMATs for characterising surface cracks
... out-of-plane Rayleigh wave compo- nents confirm that the transmission of a Rayleigh wave underneath a surface- breaking defect is affected by both the slot angle and ...slot depth using the ...
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Air-Coupled Lamb and Rayleigh Waves for Remote NDE of Defects and Material Elastic Properties
... Conventional air-coupled ultrasound (ACU) is a well-established tool for acoustic NDT and material characterization. Its major shortcoming is concerned with a week penetration into solid materials due to a severe ...
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Distribution of Base Rock Depth Estimated from Rayleigh Wave Measurement by Forced Vibration Tests
... Recently, Rayleigh methods have often come to be used for investigating ground profiles, that make use of the dispersive characteristics of Rayleigh waves observed in microtremor or forced vibration ...
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Sensitivity kernels for time-distance helioseismology: Efficient computation for spherically symmetric solar models
... Key words. Sun: helioseismology – Sun: oscillations – Sun: interior – methods: numerical 1. Introduction The aim of time-distance helioseismology ( Duvall et al. 1993 ) is to infer the subsurface structure of the Sun by ...
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The depth averaged numerical simulation of laminar thin film flows with capillary waves
... surface waves and the sup- pression of ripples. This high sensitivity of solutions to sur- face tension further calls into question the validity of simply incorporating high surface tension as a numerical ...
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Depth sensitivity of seismic coda waves to velocity perturbations in an elastic heterogeneous medium
... Time dependence of the relative velocity change in the coda - possibility to discriminate a shallow and a deep perturbation.. Bulk Regime: Diffusion vs Radiative transfer absorbing[r] ...
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Rayleigh-Bloch waves along elastic diffraction gratings
... guide waves of specific frequency: see figure 8, wherein the removal of two voids within the grating leads to a confinement of the RB wave in the defect so ...scattered waves; waves could even be ...
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Surface cracks in metals and their characteristics using Rayleigh waves
... Node arrangement for second order finite difference model of a Ricker type pulse of Rayleigh waves on a three-quarter space.. 140 iterations.[r] ...
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Fast Depth-Based Subgraph Kernels for Unattributed Graphs
... the depth-based representation around the centroid ...more depth-based features of a graph than the JSSK ...WL kernels, our ISK kernel overcomes the notorious tottering problem that arises in the ...
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The use of reflected Rayleigh waves to study rough contact interfaces
... A collection of reflected pulses (i.e. pulse D), taken at four discrete load steps of 500 N up to 2000 N is shown in the time domain in Fig.14 after a bandpass filter has been applied to remove noise. Fig.14 Time domain ...
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Rayleigh waves in a thermoelastic granular medium under initial stress
... Abstract. We study the effect of initial stress on the propagation of Rayleigh waves in a granular medium under incremental thermal stresses. We also obtain the frequency equa- tion, in the form of a ...
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Enhanced sensing and conversion of ultrasonic Rayleigh waves by elastic metasurfaces
... www.nature.com/scientificreports/ was used in absolute calibration mode so that the signal amplitude measured at each point was directly propor- tional to the surface amplitude regardless of the optical return at that ...
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Propagation of stoneley, rayleigh and love waves in viscoelastic media of higher order
... on Rayleigh wave propagation in a homogeneous, isotropic elastic solid ...Stoneley waves. Recently Abd-Alla and Ahmed [16] studied the Rayleigh waves in an orthotropic thermoelastic medium ...
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The Low Frequency Sensitivity to Gravitational Waves for ASTROD
... ƒ) 1/2 m s -2 Hz -1/2 in the frequency range 10 -5 Hz ≤ ƒ ≤ 10 -4 Hz and 9.5 × 10 -15 (10 - 5 Hz ⁄ ƒ) m s -2 Hz -1/2 in the frequency range 3 × 10 -6 Hz ≤ ƒ ≤ 10 -5 Hz have been suggested in [13]. Inspection of table 2 ...
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Surface waves magnitude estimation from ionospheric signature of Rayleigh waves measured by Doppler sounder and OTH radar
... of Rayleigh waves, mainly by Doppler sounders, highlighted in the past that Rayleigh waves produce in the atmosphere/ionosphere acoustic waves with frequencies higher than Brunt-Väisälä ...
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