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Journal articles on the topic 'Rayleigh-to-love wave ratio'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Li, Jing, Sherif Hanafy, Zhaolun Liu, and Gerard T. Schuster. "Wave-equation dispersion inversion of Love waves." GEOPHYSICS 84, no. 5 (2019): R693—R705. http://dx.doi.org/10.1190/geo2018-0039.1.

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We present a theory for wave-equation inversion of Love-wave dispersion curves, in which the misfit function is the sum of the squared differences between the wavenumbers along the predicted and observed dispersion curves. Similar to inversion of Rayleigh-wave dispersion curves, the complicated Love-wave arrivals in traces are skeletonized as simpler data, namely, the picked dispersion curves in the [Formula: see text] domain. Numerical solutions to the SH-wave equation and an iterative optimization method are then used to invert these dispersion curves for the S-wave velocity model. This proc

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2

TOKIMATSU, Kohji, and Hiroshi ARAI. "EFFECTS OF RAYLEIGH TO LOVE WAVE AMPLITUDE RATIO ON MICROTREMOR HORIZONTAL-TO-VERTICAL SPECTRAL RATIO." Journal of Structural and Construction Engineering (Transactions of AIJ) 63, no. 511 (1998): 69–75. http://dx.doi.org/10.3130/aijs.63.69_5.

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3

Malkoti, Ajay, Arjun Datta, and Shravan M. Hanasoge. "Rayleigh-wave H/V ratio measurement from ambient noise cross-correlations and its sensitivity to VP: a numerical study." Geophysical Journal International 227, no. 1 (2021): 472–82. http://dx.doi.org/10.1093/gji/ggab228.

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SUMMARY The promise of passive seismology has increasingly been realized in recent years. Given the expense in installing and maintaining seismic station networks, it is important to extract as much information from the measurements as possible. In this context, the ellipticity or H/V amplitude ratio of Rayleigh waves can prove to be a valuable observable in ambient noise seismology due to its complimentary sensitivity to subsurface structure, compared to phase and group-velocity dispersion, as well as its potential for constraining VP structure in addition to VS. However, the suitability of t

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4

Hawkins, Rhys, and Malcolm Sambridge. "An Adjoint Technique for Estimation of Interstation Phase and Group Dispersion from Ambient Noise Cross Correlations." Bulletin of the Seismological Society of America 109, no. 5 (2019): 1716–28. http://dx.doi.org/10.1785/0120190060.

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Abstract A method of extracting group and phase velocity dispersions jointly for Love‐ and Rayleigh‐wave observations is presented. This method uses a spectral element representation of a path average Earth model parameterized with density, shear‐wave velocity, radial anisotropy, and VP/VS ratio. An initial dispersion curve is automatically estimated using a heuristic approach to prevent misidentification of the phase. A second step then more accurately fits the observed noise correlation function (NCF) between interstation pairs in the frequency domain. For good quality cross correlations wit

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5

Mendecki, Maciej J., Barbara Bieta, Mateusz Mateuszów, and Paweł Suszka. "Comparison of site effect values obtained by HVSR and HVSRN methods for single-station measurements in Tarnówek, South-Western Poland." Contemporary Trends in Geoscience 5, no. 1 (2016): 18–27. http://dx.doi.org/10.1515/ctg-2016-0002.

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Abstract This study compares the HVSR technique (Horizontal to Vertical Spectral Ratio), based on seismic event records, and the HVSRN technique (Horizontal to Vertical Spectral Ratio of Noise) using seismic noise registrations. Both methods allow us to study the amplification phenomenon of a horizontal component of seismic waves when the waves reach loose sediments in subsurface layers. The seismic data were measured at a three-component single seismic station located in the village of Tarnówek, in the Legnica-Głogów Copper District. The results of the study demonstrate that average HVSRN and

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6

Tanimoto, Toshiro, Céline Hadziioannou, Heiner Igel, Joachim Wasserman, Ulrich Schreiber, and André Gebauer. "Estimate of Rayleigh-to-Love wave ratio in the secondary microseism by colocated ring laser and seismograph." Geophysical Research Letters 42, no. 8 (2015): 2650–55. http://dx.doi.org/10.1002/2015gl063637.

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7

Tanimoto, Toshiro, Céline Hadziioannou, Heiner Igel, et al. "Seasonal variations in the Rayleigh-to-Love wave ratio in the secondary microseism from colocated ring laser and seismograph." Journal of Geophysical Research: Solid Earth 121, no. 4 (2016): 2447–59. http://dx.doi.org/10.1002/2016jb012885.

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8

Yuan, Siyuan, Ariel Lellouch, Robert G. Clapp, and Biondo Biondi. "Near-surface characterization using a roadside distributed acoustic sensing array." Leading Edge 39, no. 9 (2020): 646–53. http://dx.doi.org/10.1190/tle39090646.1.

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Due to the broadband nature of distributed acoustic sensing (DAS) measurement, a roadside section of the Stanford DAS-2 array can record seismic signals from various sources. For example, it measures the earth's quasistatic deformation caused by the weight of cars (less than 0.8 Hz) as well as Rayleigh waves induced by earthquakes (less than 3 Hz) and by dynamic car-road interactions (3–20 Hz). We directly utilize the excited surface waves for shallow shear-wave velocity inversion. Rayleigh waves induced by passing cars have a consistent fundamental mode and a noisier first mode. By stacking d

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9

Tanimoto, Toshiro, Chin-Jen Lin, Céline Hadziioannou, Heiner Igel, and Frank Vernon. "Estimate of Rayleigh-to-Love wave ratio in the secondary microseism by a small array at Piñon Flat observatory, California." Geophysical Research Letters 43, no. 21 (2016): 11,173–11,181. http://dx.doi.org/10.1002/2016gl071133.

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10

Tsuno, Seiji, Andi Muhamad Pramatadie, Yadab P. Dhakal, Kosuke Chimoto, Wakana Tsutsumi, and Hiroaki Yamanaka. "Long-Period Ground Motions Observed in the Northern Part of Kanto Basin, During the 2011 off the Pacific Coast of Tohoku Earthquake, Japan." Journal of Disaster Research 8, sp (2013): 781–91. http://dx.doi.org/10.20965/jdr.2013.p0781.

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During the 2011 off the Pacific coast of Tohoku earthquake (Mw 9.0), strong ground motions were observed at many seismic stations in the Tokyo Metropolitan Area located about 200 km away from the southern edge of the earthquake source fault. Large earthquake responses in high-rise buildings having long natural periods of several seconds were also observed. The largest ground responses for a period of 4 to 5 seconds were observed locally in Oyama (K-NET TCG012) and Koga (K-NET IBR009) on the border between Tochigi and Ibaraki Prefectures in the northern part of Kanto basin. Geophysical informat

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11

Deschenes, Michael R., Clinton M. Wood, Liam M. Wotherspoon, Brendon A. Bradley, and Ethan Thomson. "Development of Deep Shear Wave Velocity Profiles in the Canterbury Plains, New Zealand." Earthquake Spectra 34, no. 3 (2018): 1065–89. http://dx.doi.org/10.1193/122717eqs267m.

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Deep (typically > 1,000 m) shear wave velocity ( V S) profiles were developed across the Canterbury region of New Zealand at nine strong-motion stations using a combination of active and passive surface wave methods. A multimode, multimethod joint inversion process, which included Rayleigh and Love wave dispersion and horizontal-to-vertical spectral ratio data, was used to develop the V S profiles at each site. A priori geologic information was used in defining preliminary constraints on the complex geologic layering of the deep basin underlying the region, including velocity reversals in l

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12

Cheng, Wei, Lintao Liu, and Guocheng Wang. "A new method for estimating the correlation of seismic waveforms based on the NTFT." Geophysical Journal International 226, no. 1 (2021): 368–76. http://dx.doi.org/10.1093/gji/ggab047.

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SUMMARY We propose a new correlation function called the similarity coefficient (SC) based on the normal time–frequency transform (NTFT) to evaluate the similarity between two non-stationary seismic signals as a function of the delay time. The SC is defined in the time–frequency spectrum of the NTFT, and the instantaneous phase and amplitude of each frequency component in a signal are used to calculate the SC. Our simulation experiments demonstrate that the SC method can effectively recognize similar signals compared to the conventional normalized cross-correlation coefficient (NCC) under high

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13

Perton, Mathieu, Zack J. Spica, Robert W. Clayton, and Gregory C. Beroza. "Shear wave structure of a transect of the Los Angeles basin from multimode surface waves and H/V spectral ratio analysis." Geophysical Journal International 220, no. 1 (2019): 415–27. http://dx.doi.org/10.1093/gji/ggz458.

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SUMMARY We use broad-band stations of the ‘Los Angeles Syncline Seismic Interferometry Experiment’ (LASSIE) to perform a joint inversion of the Horizontal to Vertical spectral ratios (H/V) and multimode dispersion curves (phase and group velocity) for both Rayleigh and Love waves at each station of a dense line of sensors. The H/V of the autocorrelated signal at a seismic station is proportional to the ratio of the imaginary parts of the Green’s function. The presence of low-frequency peaks (∼0.2 Hz) in H/V allows us to constrain the structure of the basin with high confidence to a depth of 6

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14

Lu, Yang, Helle A. Pedersen, and Laurent Stehly. "Mapping the seismic noise field in Europe: spatio-temporal variations in wavefield composition and noise source contributions." Geophysical Journal International 228, no. 1 (2021): 171–92. http://dx.doi.org/10.1093/gji/ggab273.

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SUMMARY We study spatial and temporal characteristics of the microseismic noise field across Europe. Rather than focusing on the areas of noise generation, the scope of this work is to characterize, at the scale of Europe, the spatio-temporal evolution of the noise wavefield that results from the interplay of the seismic noise sources and the propagation effect. To that end, we perform single station analysis in three period bands (PB1: 2.5−5 s; PB2: 5−10 s and PB3: 10−20 s) using three-component seismic data recorded by ∼1000 broad-band stations in the time period 2011–2019. We calculate, for

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15

Baptiste, V., and A. Tommasi. "Petrophysical constraints on the seismic properties of the Kaapvaal craton mantle root." Solid Earth Discussions 5, no. 2 (2013): 963–1005. http://dx.doi.org/10.5194/sed-5-963-2013.

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Abstract. We calculated the seismic properties of 47 mantle xenoliths from 9 kimberlitic pipes in the Kaapvaal craton based on their modal composition, the crystal preferred orientations (CPO) of olivine, ortho- and clinopyroxene, and garnet, the Fe content of olivine, and the pressures and temperatures at which the rocks were equilibrated. These data allow constraining the variation of seismic anisotropy and velocities with depth. The fastest P wave and fast split shear wave (S1) polarization direction is always close to olivine [100] maximum. Changes in olivine CPO symmetry result in minor v

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16

Baptiste, V., and A. Tommasi. "Petrophysical constraints on the seismic properties of the Kaapvaal craton mantle root." Solid Earth 5, no. 1 (2014): 45–63. http://dx.doi.org/10.5194/se-5-45-2014.

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Abstract. We calculated the seismic properties of 47 mantle xenoliths from 9 kimberlitic pipes in the Kaapvaal craton based on their modal composition, the crystal-preferred orientations (CPO) of olivine, ortho- and clinopyroxene, and garnet, the Fe content of olivine, and the pressures and temperatures at which the rocks were equilibrated. These data allow constraining the variation of seismic anisotropy and velocities within the cratonic mantle. The fastest P and S2 wave propagation directions and the polarization of fast split shear waves (S1) are always subparallel to olivine [100] axes of

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17

Juretzek, C., and C. Hadziioannou. "Where do ocean microseisms come from? A study of Love-to-Rayleigh wave ratios." Journal of Geophysical Research: Solid Earth 121, no. 9 (2016): 6741–56. http://dx.doi.org/10.1002/2016jb013017.

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18

Taylor, Steven R., Marvin D. Denny, Eileen S. Vergino, and Ronald E. Glaser. "Regional discrimination between NTS explosions and western U.S. earthquakes." Bulletin of the Seismological Society of America 79, no. 4 (1989): 1142–76. http://dx.doi.org/10.1785/bssa0790041142.

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Abstract A number of earthquake/explosion discriminants outlined in Pomeroy et al. (1982) are evaluated in the western United States. The data consist of 233 NTS explosions and 130 western U.S. earthquakes in the magnitude range of 2.5 to 6.5 recorded at four broadband seismic stations operated by Lawrence Livermore National Laboratory (LLNL). The stations surround NTS at distances of about 200 to 400 km. The propagation paths for the earthquakes range from approximately 175 to 1300 km and are confined mainly to the Basin and Range. The discriminants tested include mb − Ms, mb, − Msh (higher m

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19

Konno, Katsuaki, and Tatsuo Ohmachi. "Ground-motion characteristics estimated from spectral ratio between horizontal and vertical components of microtremor." Bulletin of the Seismological Society of America 88, no. 1 (1998): 228–41. http://dx.doi.org/10.1785/bssa0880010228.

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Abstract The spectral ratio between horizontal and vertical components (H/V ratio) of microtremors measured at the ground surface has been used to estimate fundamental periods and amplification factors of a site, although this technique lacks theoretical background. The aim of this article is to formulate the H/V technique in terms of the characteristics of Rayleigh and Love waves, and to contribute to improve the technique. The improvement includes use of not only peaks but also troughs in the H/V ratio for reliable estimation of the period and use of a newly proposed smoothing function for b

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20

Cho, I., K. Yoshida, and H. Uebayashi. "Microtremor surveys based on rotational seismology: theoretical analysis with focus on separation of Rayleigh and Love waves in general wavefield of microtremors." Geophysical Journal International, September 3, 2021. http://dx.doi.org/10.1093/gji/ggab358.

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Summary The applicability of rotational seismology to the general wavefield of microtremors is theoretically demonstrated based on a random process model of a two-dimensional wavefield. We show the effectiveness of taking the rotations (i.e. spatial differentiation) of microtremor waveforms in separating the Rayleigh and Love waves in a wavefield where waves are simultaneously arriving from various directions with different intensities. This means that a method based on rotational seismology (a rotational method) is capable of separating Rayleigh and Love waves without adopting a specific arra

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