Update search
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Asia
-
Central Asia
-
Kazakhstan (1)
-
-
Far East
-
China
-
Hubei China
-
Wuhan China (1)
-
-
Xinjiang China
-
Junggar (2)
-
Junggar Basin (1)
-
Tarim Basin (1)
-
-
Yangtze Three Gorges (2)
-
-
-
Kyrgyzstan (1)
-
Tien Shan (1)
-
-
Commonwealth of Independent States
-
Kazakhstan (1)
-
Kyrgyzstan (1)
-
-
United States
-
Florida
-
Florida Keys (1)
-
Miami-Dade County Florida (1)
-
-
-
-
geologic age
-
Cenozoic (1)
-
-
igneous rocks
-
igneous rocks
-
volcanic rocks
-
basalts
-
mid-ocean ridge basalts (1)
-
-
-
-
-
Primary terms
-
Asia
-
Central Asia
-
Kazakhstan (1)
-
-
Far East
-
China
-
Hubei China
-
Wuhan China (1)
-
-
Xinjiang China
-
Junggar (2)
-
Junggar Basin (1)
-
Tarim Basin (1)
-
-
Yangtze Three Gorges (2)
-
-
-
Kyrgyzstan (1)
-
Tien Shan (1)
-
-
Cenozoic (1)
-
crust (2)
-
data processing (5)
-
deformation (1)
-
earthquakes (2)
-
faults (1)
-
geophysical methods (8)
-
igneous rocks
-
volcanic rocks
-
basalts
-
mid-ocean ridge basalts (1)
-
-
-
-
mantle (2)
-
orogeny (1)
-
plate tectonics (1)
-
tunnels (1)
-
United States
-
Florida
-
Florida Keys (1)
-
Miami-Dade County Florida (1)
-
-
-
GeoRef Categories
Era and Period
Book Series
Date
Availability
Retrieval of surface waves from high-speed-train-induced vibrations using seismic interferometry Available to Purchase
A fossil oceanic lithosphere preserved inside a continent Available to Purchase
The 2014 Zigui Earthquake Sequence near the Three Gorges Dam in China Available to Purchase
Seismic anisotropy in the central Tien Shan unveils rheology-controlled deformation during intracontinental orogenesis Available to Purchase
Multichannel analysis of Love waves in a 3D seismic acquisition system Available to Purchase
Delineating Shallow S ‐Wave Velocity Structure Using Multiple Ambient‐Noise Surface‐Wave Methods: An Example from Western Junggar, China Available to Purchase
Feasibility of detecting near-surface feature with Rayleigh-wave diffraction Available to Purchase
Abstract Detection of near-surfaces features such as voids and faults is challenging due to the complexity of near-surface materials and the limited resolution of geophysical methods. Although multichannel, high-frequency, surface-wave techniques can provide reliable shear (S)-wave velocities in different geological settings, they are not suitable for detecting voids directly based on anomalies of the S-wave velocity because of limitations on the resolution of S-wave velocity profiles inverted from surface-wave phase velocities. Therefore, we studied the feasibility of directly detecting near-surfaces features with surface-wave diffractions. Based on the properties of surface waves, we have derived a Rayleigh-wave diffraction traveltime equation. We also have solved the equation for the depth to the top of a void and an average velocity of Rayleigh waves. Using these equations, the depth to the top of a void/fault can be determined based on traveltime data from a diffraction curve. In practice, only two diffraction times are necessary to define the depth to the top ofa void/fault and the average Rayleigh-wave velocity that generates the diffraction curve. We used four two-dimensional square voids to demonstrate the feasibility of detecting a void with Rayleigh-wave diffractions: a 2 m by 2 m with a depth to the top of the void of 2 m, 4 m by 4 m with a depth to the top of the void of 7 m, and 6 m by 6 m with depths to the top of the void 12 m and 17 m. We also modeled surface waves due to a vertical fault. Rayleigh-wave diffractions were recognizable for all these models after FK filtering was applied to the synthetic data. The Rayleigh-wave diffraction traveltime equation was verified by the modeled data. Modeling results suggested that FK filtering is critical to enhance diffracted surface waves. A real-world example is presented to show how to utilize the derived equation of surface-wave diffractions. © 2006 Elsevier B.V All rights reserved.
Love-wave waveform inversion in time domain for shallow shear-wave velocity Available to Purchase
Near-surface shear-wave velocities and quality factors derived from high-frequency surface waves Available to Purchase
Surface-wave observations after integrating active and passive source data Available to Purchase
Investigation and Use of Surface-wave Characteristics for Near-surface Applications Available to Purchase
Abstract High-frequency surface-wave methods can provide reliable near-surface shear-wave (S-wave) velocity, which is a key parameter in many shallow-engineering applications, groundwater and environmental studies, and petroleum exploration. Recent research and key accomplishments at the China University of Geosciences at Wuhan into nearfield effects on surface-wave analysis provide not only insight into minimum-source geophone offsets required for generating high-quality surface-wave images but also provide a better understanding of the propagation characteristics of seismic wavefields through near-surface materials. New numerical modeling and dispersion-analysis algorithms are key tools used routinely in those studies. The modeling results illustrate very different energy-partitioning characteristics for Rayleigh and Love waves. Using a high-resolution linear Radon transform produces dispersion images with much better resolution and therefore represents a tool for more accurate separation and determination of phase velocities for different modes. Mode separation results in wavefield components that individually possess great potential for increasing horizontal resolution of S-wave velocity-field determinations. Amplitude corrections can significantly improve the accuracy of phase-velocity estimates from mixed-modal wavefields. Results from two simple models demonstrate how dramatic topographic changes can distort wavefields. This finding was the catalyst for suggesting that a topographic correction should be considered for surface-wave data acquired on a rugged ground surface. Phase-velocity inversion is an ill-posed problem. Rayleigh-wave sensitivity analysis reveals the difficulty in estimating S-wave velocities for a model with a low-velocity layer. Constraints in the model space are therefore necessary. Approximating cutoffs could help build a better initial model and provide critical information about the subsurface when higher modes are present.