Results 131 to 140 of about 203 (193)
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract Low frequency sound can travel great distances in planetary atmospheres. When these waves reflect off the air/ground interface, energy may be absorbed or transferred to mechanical waves in the subsurface. This study describes the direct and reflected acoustic wave generated by the re‐entry of the OSIRIS‐REx Sample Return Capsule captured on a ...
Daniel C. Bowman +12 more
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Thermal Structure Beneath the Himalayan Orogen Revealed by Pn‐Wave Receiver Function Imaging
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract The Himalayan orogen formed through convergence between the Indian and Eurasian plates, and parts of the subducting Indian crust were impeded by the Lhasa terrane and accreted into the orogen. However, whether the Indian lower crust was stripped from the downgoing plate and incorporated into the orogen, and by what mechanism, remain debated ...
Liangyu Zhang +3 more
wiley +1 more source
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Effects of Attenuation on Seismic Reflections
IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019Seismic reflections at an interface are often regarded as the variation of the acoustic impedance (product of seismic velocity and density) in a media. In fact, they can also be generated due to the difference in absorption of the seismic energy. In this work, we investigate the impacts of attenuation on seismic reflections based on the diffusive ...
Haixia Zhao +3 more
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Pitfalls In Shallow Seismic Reflection
7th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1994Substantial progress has occurred during the past 15 years in development of shallow CDP seismic-reflection techniques, but there are occasional interpretation problems with the resulting data. We discuss examples of the pitfalls of the method, along with some procedures to help avoid them.
Don W. Steeples, Richard D. Miller
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Seismic reflectivity attributes
SEG Technical Program Expanded Abstracts 2015, 2015Seismic structural attributes (e.g., curvatures and similarity), which are usually extracted from post-stack seismic data, have been been widely used to help seismic interpretation. Because seismic data is band limited and contaminated with noise, which results in low resolution of the extracted attribute outputs.
Rui Zhang, Bo Zhang
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Chinese Journal of Geophysics, 2007
AbstractA layer‐by‐layer waveform inversion method is developed to derive the velocities of a multi‐layered model. Firstly, one new concept, medium perturbation‐response, is introduced and the gradient method for waveform inversion is analysed. Essentially, waveform inversion is to extract residual structural information between the real earth and ...
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AbstractA layer‐by‐layer waveform inversion method is developed to derive the velocities of a multi‐layered model. Firstly, one new concept, medium perturbation‐response, is introduced and the gradient method for waveform inversion is analysed. Essentially, waveform inversion is to extract residual structural information between the real earth and ...
openaire +1 more source