Ground structure imaging by inversions of Rayleigh wave ellipticity: sensitivity analysis and application to European strong-motion sites

Hobiger, Manuel; Cornou, Cécile; Wathelet, Marc; Giulio, Giuseppe Di; Knapmeyer‐Endrun, Brigitte; Renalier, F.; Bard, Pierre‐Yves; Savvaidis, Alexandros; Hailemikael, Salomon; Bihan, Nicolas Le; Ohrnberger, Matthias; Theodoulidis, Nikos

doi:10.1093/gji/ggs005

Cited by 102 publications

(61 citation statements)

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“…The HVSRN inversion requires a priori knowledge of the sediment and underlying bedrock (e.g.,

H

V_{s}

ρ

), obtained from independent geological and geophysical investigations, for rapid convergence of the inversion to the exact (and geologically correct) range of solutions (Fäh, Kind and Giardini ; Scherbaum et al ). According to Hobiger et al (), different

V_{s}

structures can produce the same Rayleigh wave ellipticity (RWE) curve because the observed HVSRN curve can be fitted by an infinite number of models (Castellaro and Mulargia ). However, Sánchez‐Sesma () reported that, for the case where little or no a priori information is available, joint inversion of the dispersion curves of Love and/or Rayleigh fundamental modes and the HVSRN curves considerably reduces the non‐uniqueness of the solutions.…”

Section: Introductionmentioning

confidence: 99%

“…Here, we focus on the downtown area of Chlef (Figure a) and perform the RWE inversion (Hobiger et al ) using RayDec technique to extract measurement curves (Hobiger et al ) from a series of ambient vibration data to map

V_{s}

structure and contribute to seismic hazard and risk assessment. Moreover, we examine the sporadic appearance of

f_{1}

across the study area in detail, which correlates with the presence of Quaternary deposits.…”

Section: Introductionmentioning

confidence: 99%

“…Whilst techniques that acquire an array of measurements for dispersion curve analysis or employ boreholes provide detailed estimates of

V_{s}

structure, they can be time‐consuming, logistically intensive and costly. However, it has been shown that the inversion of the theoretical RWE at an investigation site, which can be retrieved using single‐station measurements, can constrain the local

V_{s}

structure via a number of methods, including the Random Decrement Technique, RayDec, (e.g., Hobiger et al ; Hobiger et al ; Ullah and Prado ), H/V time–frequency analysis (Fäh et al ; Picotti et al ), or through detection on the observed HVSRN curve, between

f_{0}

and

\sim 2 f_{0}

(Fäh, Kind and Giardini ; Mundepi et al ; Rosa‐Cintas et al ). Here, we employ the RayDec technique to estimate the

V_{s}

structure in our study area, using Dinver software from the GEOPSY package (Wathelet ), which is based on the neighbourhood algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…For the selection of the inverted part of the ellipticity measurement curve, for

f_{0}

frequency range, we followed the rules of Hobiger et al (), which consist of consideration of the right flank of ellipticity curves with singularities (e.g., peaks and troughs), and the whole area of the broad peak of ellipticity curves without such singularities. The Z′1, Z″1, Z′2, and Z″3 zones belong to the ellipticity with singularities and the inverted part is selected between peak and trough.…”

Section: Introductionmentioning

confidence: 99%

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S‐wave velocity structure of Chlef City, Algeria, by inversion of Rayleigh wave ellipticity

Layadi

Semmane

Yelles‐Chaouche

2018

Near Surface Geophysics

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Chlef City, Algeria, which is located in the Lower Cheliff Basin, is vulnerable to seismic hazards. Since there is no constrained velocity model for the Lower Cheliff Basin, particularly at greater depths, we conducted an ambient vibration investigation to map the shear‐wave velocity structure beneath the city, with the primary goal of supplementing the existing microzonation studies. Here, we inverted the Rayleigh wave ellipticity measurement curve of ambient vibrations measurements from 120 sites in Chlef City to estimate the shear‐wave velocity structure. The study area was subdivided into six zones based on similarities between the observed horizontal‐to‐vertical spectral ratio of the ambient vibrations curves. Our resultant shear‐wave velocity models show that the observed fundamental frequencies (0.3–1.6 Hz) are related to a thick layer (~800 m) of upper Miocene deposits, where Vs=1000 m/s on average. Generally, the Mesozoic basement shows Vs>2000 m/s. Moreover, the clear peaks observed at higher frequencies and only in the northwest part of the city are related to a thin layer of Quaternary deposits (Vs= ∼2000 m/s).

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“…The HVSRN inversion requires a priori knowledge of the sediment and underlying bedrock (e.g.,

H

V_{s}

ρ

V_{s}

Section: Introductionmentioning

confidence: 99%

V_{s}

structure and contribute to seismic hazard and risk assessment. Moreover, we examine the sporadic appearance of

f_{1}

across the study area in detail, which correlates with the presence of Quaternary deposits.…”

Section: Introductionmentioning

confidence: 99%

“…Whilst techniques that acquire an array of measurements for dispersion curve analysis or employ boreholes provide detailed estimates of

V_{s}

V_{s}

f_{0}

and

\sim 2 f_{0}

(Fäh, Kind and Giardini ; Mundepi et al ; Rosa‐Cintas et al ). Here, we employ the RayDec technique to estimate the

V_{s}

structure in our study area, using Dinver software from the GEOPSY package (Wathelet ), which is based on the neighbourhood algorithm.…”

Section: Introductionmentioning

confidence: 99%

“…For the selection of the inverted part of the ellipticity measurement curve, for

f_{0}

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

S‐wave velocity structure of Chlef City, Algeria, by inversion of Rayleigh wave ellipticity

Layadi

Semmane

Yelles‐Chaouche

2018

Near Surface Geophysics

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show abstract

“…Surface waves that are generated by natural sources and (or) man-made activities have lower frequencies (longer wavelengths) than waves generated by impact loads. Multiple techniques have been applied for analysis of ambient noise (passive-source) vibrations acquired by a linear receiver array (e.g., Louie 2001;Park and Miller 2008), a two-dimensional array (e.g., Asten 2006;Di Giulio et al 2006;Garofalo et al 2016;Wathelet et al 2008) or a single station (e.g., Gouveia et al 2016;Hobiger et al 2009Hobiger et al , 2013. By combining results of active-source and passive-source surveys, an increased range in investigation depth can be obtained.…”

Section: Introductionmentioning

confidence: 99%

Tool for analysis of multichannel analysis of surface waves (MASW) field data and evaluation of shear wave velocity profiles of soils

2018

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Multichannel analysis of surface waves (MASW) is a fast, low-cost, and environmentally friendly technique to estimate shear wave velocity profiles of soil sites. This paper introduces a new open-source software, MASWaves, for processing and analysing multichannel surface wave records using the MASW method. The software consists of two main parts: a dispersion analysis tool (MASWaves Dispersion) and an inversion analysis tool (MASWaves Inversion). The performance of the dispersion analysis tool is validated by comparison with results obtained by the Geopsy software package. Verification of the inversion analysis tool is carried out by comparison with results obtained by the software WinSASW and theoretical dispersion curves presented in the literature. Results of MASW field tests conducted at three sites in south Iceland are presented to demonstrate the performance and robustness of the new software. The soils at the three test sites ranged from loose sand to cemented silty sand. In addition, at one site, the results of existing spectral analysis of surface waves (SASW) measurements were compared with the results obtained by MASWaves.

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Submarine permafrost depth from ambient seismic noise

Overduin

Haberland

Ryberg

et al. 2015

Geophysical Research Letters

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Permafrost inundated since the last glacial maximum is degrading, potentially releasing trapped or stabilized greenhouse gases, but few observations of the depth of ice-bonded permafrost (IBP) below the seafloor exist for most of the arctic continental shelf. We use spectral ratios of the ambient vibration seismic wavefield, together with estimated shear wave velocity from the dispersion curves of surface waves, for estimating the thickness of the sediment overlying the IBP. Peaks in spectral ratios modeled for three-layered 1-D systems correspond with varying thickness of the unfrozen sediment. Seismic receivers were deployed on the seabed around Muostakh Island in the central Laptev Sea, Siberia. We derive depths of the IBP between 3.7 and 20.7 m ± 15%, increasing with distance from the shoreline. Correspondence between expected permafrost distribution, modeled response, and observational data suggests that the method is promising for the determination of the thickness of unfrozen sediment.

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Ground structure imaging by inversions of Rayleigh wave ellipticity: sensitivity analysis and application to European strong-motion sites

Cited by 102 publications

References 50 publications

S‐wave velocity structure of Chlef City, Algeria, by inversion of Rayleigh wave ellipticity

S‐wave velocity structure of Chlef City, Algeria, by inversion of Rayleigh wave ellipticity

Tool for analysis of multichannel analysis of surface waves (MASW) field data and evaluation of shear wave velocity profiles of soils

Submarine permafrost depth from ambient seismic noise

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