The nature of noise wavefield and its applications for site effects studies

Bonnefoy-Claudet, Sylvette; Cotton, Fabrice; Bard, Pierre‐Yves

doi:10.1016/j.earscirev.2006.07.004

Cited by 575 publications

(449 citation statements)

References 108 publications

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“…These techniques are founded on using the energetically dominant part of seismic noise, which consists mainly of surface waves (Bonnefoy-Claudet et al, 2006). Two different types of methods exploit surface wave energy from seismic noise.…”

Section: Passive Seismic (Array and H / V Techniques)mentioning

confidence: 99%

Characterization of a complex near-surface structure using well logging and passive seismic measurements

Benjumea¹,

Macau²,

Gabàs³

et al. 2016

Solid Earth

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Abstract. We combine geophysical well logging and passive seismic measurements to characterize the near-surface geology of an area located in Hontomin, Burgos (Spain). This area has some near-surface challenges for a geophysical study. The irregular topography is characterized by limestone outcrops and unconsolidated sediments areas. Additionally, the near-surface geology includes an upper layer of pure limestones overlying marly limestones and marls (Upper Cretaceous). These materials lie on top of Low Cretaceous siliciclastic sediments (sandstones, clays, gravels). In any case, a layer with reduced velocity is expected. The geophysical data sets used in this study include sonic and gamma-ray logs at two boreholes and passive seismic measurements: three arrays and 224 seismic stations for applying the horizontal-to-vertical amplitude spectra ratio method (H/V). Well-logging data define two significant changes in the P -wave-velocity log within the Upper Cretaceous layer and one more at the Upper to Lower Cretaceous contact. This technique has also been used for refining the geological interpretation. The passive seismic measurements provide a map of sediment thickness with a maximum of around 40 m and shear-wave velocity profiles from the array technique. A comparison between seismic velocity coming from well logging and array measurements defines the resolution limits of the passive seismic techniques and helps it to be interpreted. This study shows how these low-cost techniques can provide useful information about near-surface complexity that could be used for designing a geophysical field survey or for seismic processing steps such as statics or imaging.

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Section: Passive Seismic (Array and H / V Techniques)mentioning

confidence: 99%

Characterization of a complex near-surface structure using well logging and passive seismic measurements

Benjumea¹,

Macau²,

Gabàs³

et al. 2016

Solid Earth

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“…However, in many cases both are just referred to as the HVSR technique. In many cases the HVSR method is ambiguously defined and subject to constant change but there are a few main theories explaining how it works assessments made by Nakamura (1989 and2008), Bard (1999) and Bonnefoy-Claudet et al (2006a). Depending on the data used the first theory considers the HVSR curves to be a result of S-waves (coda waves) resonating in unconsolidated sediments ( Fig.1) with a slight influence of surface waves.…”

Section: Hvsr and Hvsrn Methodsmentioning

confidence: 99%

“…However, it is still disputed whether the amplification coefficient might also be determined in this way (Konno & Ohmachi 1998, Bard 1999, Bonnefoy-Claudet et al 2006aand 2006b, Atakan 2007, Gosar et al 2010, Mendecki et al 2014.…”

Section: Hvsr and Hvsrn Methodsmentioning

confidence: 99%

“…The amplification phenomenon relies on an increase in seismic incident amplitude in a horizontal direction ( Fig.1) caused by wave transfer from a rigid layer to a soft layer (Bonnefoy-Claudet et al 2006a and2006b;Nakamura 2008). The horizontal to vertical amplitude ratio ina rigid layer (for isotropic and homogenic medium) is equal to 1 but in a soft layer, because of occurrence of impedance (different velocities and densities), the horizontal component is enhanced.…”

Section: Hvsr and Hvsrn Methodsmentioning

confidence: 99%

“…The principles of the HVSR method and its applicability have often been presented in numerous publications e.g. : Nakamura (1989), Lermo & Chavez-Garcia (1993), Bard (1999), Delgado et al (2000), Bonnefoy-Claudet et al (2006a and2006b), Bindi et al (2008) and (Nakamura 2008).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of site effect values obtained by HVSR and HVSRN methods for single-station measurements in Tarnówek, South-Western Poland.

Mendecki¹,

Bieta²,

Mateuszów³

et al. 2016

Contemporary Trends in Geoscience

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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 HVSR maxima can be distinguished: for periods approximately 3.78 s (H/V = 6.2) and 3.969 s (H/V = 8.98) respectively. The evaluated share of the Rayleigh wave component in the recorded values was β = 0.58 and it can be suggested that the Love wave share in surface motion was insignificant. The Love wave share remains unknown.

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Interpretation of resonance frequencies recorded during hydraulic fracturing treatments

Tary

Baan

Eaton

2014

J. Geophys. Res. Solid Earth

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Hydraulic fracturing treatments are often monitored by strings of geophones deployed in boreholes. Instead of picking discrete events only, we here use time‐frequency representations of continuous recordings to identify resonances in two case studies. This paper outlines an interpretational procedure to identify their cause using a subdivision into source, path, and receiver‐side effects. For the first case study, two main resonances are observed both at depth by the downhole geophones and on the surface by two broadband arrays. The two acquisition networks have different receiver and path effects, yet recorded the same resonances; these resonances are therefore likely generated by source effects. The amplitude pattern at the surface arrays indicates that these resonances are probably due to pumping operations. In the second case study, selective resonances are detected by the downhole geophones. Resonances coming from receiver effects are either lower or higher frequency, and wave propagation modeling shows that path effects are not significant. We identify two possible causes within the source area, namely, eigenvibrations of fractures or non‐Darcian flow within the hydraulic fractures. In the first situation, 15–10 m long fluid‐filled cracks could generate the observed resonances. An interconnected fracture network would then be required, corresponding to mesoscale deformation of the reservoir. Alternatively, systematic patterns in non‐Darcian fluid flow within the hydraulic fracture could also be their leading cause. Resonances can be used to gain a better understanding of reservoir deformations or dynamic fluid flow perturbations during fluid injection into hydrocarbon and geothermal reservoirs, CO2 sequestration, or volcanic eruptions.

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The nature of noise wavefield and its applications for site effects studies

Cited by 575 publications

References 108 publications

Characterization of a complex near-surface structure using well logging and passive seismic measurements

Characterization of a complex near-surface structure using well logging and passive seismic measurements

Comparison of site effect values obtained by HVSR and HVSRN methods for single-station measurements in Tarnówek, South-Western Poland.

Interpretation of resonance frequencies recorded during hydraulic fracturing treatments

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