Article
Geochemistry & Geophysics
Hao Rao, Yinhe Luo, Kaifeng Zhao, Yingjie Yang
Summary: The study introduces an alternative method called the two-station C-2 method, which uses a single station as a virtual source to retrieve surface wave phase velocities between asynchronous stations. Results show that this method can obtain reliable phase velocity measurements and can significantly improve ray path coverage and resolution in ambient noise tomography for areas between asynchronous seismic arrays.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
I. Barone, G. Cassiani, A. Ourabah, J. Boaga, M. Pavoni, R. Deiana
Summary: In this paper, the analysis of passive seismic noise recorded around the Scrovegni Chapel in Padua using a dense 2-D network of autonomous seismic nodes is presented. The ambient noise is characterized and cross-correlation analysis is performed to retrieve virtual source gathers. Traveltimes are extracted and Eikonal tomography is run to retrieve phase velocity maps and azimuthal anisotropy. The results obtained from active and passive methods are compared and discussed, and a strategy for the integration of passive and active information is proposed. The joint analysis improves the accuracy of the shear wave velocity model at depth.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Joshua B. Russell, Colleen A. Dalton
Summary: In this study, shear attenuation in the oceans is investigated using Helmholtz tomography applied to ocean-bottom seismometer data. The research overcomes unique challenges in marine environments and provides new insights into attenuation characteristics in the NoMelt and JdF regions, as well as strong local site amplification.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
P. Moulik, V Lekic, B. Romanowicz, Z. Ma, A. Schaeffer, T. Ho, E. Beucler, E. Debayle, A. Deuss, S. Durand, G. Ekstrom, S. Lebedev, G. Masters, K. Priestley, J. Ritsema, K. Sigloch, J. Trampert, A. M. Dziewonski
Summary: Global variations in the propagation of surface waves provide unique constraints on the source properties and structure of the Earth's mantle. This study aims to construct a reference data set of multimode dispersion measurements by reconciling large and diverse catalogues of surface wave dispersion. The study finds that the measurements of fundamental-mode dispersion are internally consistent, but the agreement deteriorates for overtones.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
A. Shaiban, S. A. L. de Ridder, A. Curtis
Summary: Surface waves are seismic waves that propagate on the Earth's surface and their depth ranges depend on frequency. By estimating the dispersion characteristics of these waves, the velocity structure beneath the surface can be inferred. Researchers have developed an inversion scheme that utilizes the scalar wave equation to estimate surface wave dispersion and reconstruct the wavefield continuously.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
S. Talavera-Soza, A. Deuss
Summary: Seismic attenuation is important for obtaining accurate estimates of Earth's temperature and composition. Using whole Earth oscillations or normal modes can help reduce the effects of scattering and focusing and improve the measurement of attenuation. Through simulations and testing, it has been found that 3-D variations in attenuation can be successfully recovered.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Angela G. Marusiak, Saikiran Tharimena, Mark P. Panning, Steven D. Vance, Christian Boehm, Simon Staehler, Martin Van Driel
Summary: A seismic investigation on Saturn's moon Enceladus was conducted to determine the thickness of the ice shell and variations in its mean thickness. By recovering phase and group velocities, and studying the frequency content of surface waves, the ice shell of Enceladus was modeled with uniform thicknesses and ice topography. Different approaches were explored to recover the mean ice shell thickness.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Le Tang, Xinding Fang
Summary: We propose a novel approach for imaging subsurface lateral heterogeneities using six-component ambient seismic noise data. This method uses the cross-correlation functions (CCFs) of the six-component data to derive surface wave dispersion curves. Unlike traditional array-based methods, our approach does not rely on the assumption of a horizontally layered model and can accurately image small-scale subsurface anomalies.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Akiko Takeo, Kiwamu Nishida, Hiroshi Aoyama, Motoko Ishise, Takeru Kai, Ryo Kurihara, Takuto Maeda, Yuta Mizutani, Yuki Nakashima, Shogo Nagahara, Xiaowen Wang, Lingling Ye, Takeshi Akuhara, Yosuke Aoki
Summary: By conducting a passive seismic campaign and analyzing ambient noise records, we measured the S-wave velocity structure beneath a lava dome, revealing a narrow and deep root of the dome and the impact of cracking on the velocity within the dome.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
S. Talavera-Soza, A. Deuss
Summary: This study improves our understanding of the 1-D attenuation structure of the Earth by measuring radial modes using more earthquake data. It also reveals strong cross-coupling between radial modes and spheroidal modes, enhancing the fit between data and synthetics.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Anant Hariharan, Colleen A. Dalton, Jordyn Babikoff, Goran Ekstrom
Summary: This study investigates interference between the fundamental mode and overtones in surface wave measurements and finds that the interference strength is influenced by source mechanism, depth, and surface wave group velocities. The findings highlight the opportunity for more accurate quality control in surface wave measurements and provide a method to improve seismic images.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Chaoqiang Xi, Jianghai Xia, Binbin Mi, Tianyu Dai, Ya Liu, Ling Ning
Summary: Ambient noise surface wave methods are valuable for determining near-surface shear wave velocities in urban areas, with higher mode information being important for dispersion curve inversion. The frequency-Bessel transform method is effective for multimode surface wave extraction, but may be affected by 'crossed' artefacts at high frequencies. The proposed modified F-J transform method, using the Hankel function, improves the accuracy of Rayleigh wave multimode dispersion measurements by avoiding these artefacts.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Shoji Sekiguchi
Summary: Limiting the number of valid nodes around a reference ray can greatly reduce the calculation time of the shortest-path method. The modified calculation method shows small average traveltime and ray path differences in velocity models. Improved travel time and ray path results can be achieved through iterative calculations and utilizing more neighbor nodes.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Enjiang Wang, Jose M. Carcione, Jing Ba
Summary: This study investigates the surface-wave propagations at the interface between a fluid layer and a double-porosity medium with cracks. The Biot-Rayleigh model is generalized to include penny-shaped cracks, and the role of mesoscopic local fluid flow (LFF) is considered. Dispersion equations for surface waves are derived, and numerical iterations are used to obtain phase velocity and attenuation. Different cases are analyzed for zero and infinite thickness of the fluid layer. The study confirms the effects of LFF at low frequencies and the impact of boundary conditions at high frequencies. The crack density affects the level of attenuation, while the aspect ratio affects the location of the relaxation peak.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
A. T. Ringler, R. E. Anthony, R. C. Aster, T. Taira, B. R. Shiro, D. C. Wilson, S. De Angelis, C. Ebeling, M. Haney, R. S. Matoza, H. D. Ortiz
Summary: The eruption of the Hunga Tonga-Hunga Ha’apai volcano in January 2022 was one of the largest recorded volcanic explosions. The eruption generated a wide range of atmospheric wave phenomena and showed unusual coupling with the oceans and solid Earth. Comparisons with the Pinatubo eruption in 1991 revealed similar mode excitations, but the amplitude was significantly greater in the Hunga Tonga eruption. The observations provide insights into the excitation and propagation of acoustic modes in the atmosphere and solid Earth.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Editorial Material
Astronomy & Astrophysics
Jing Li, Zhiguo Meng, Alexander Gusev
ADVANCES IN ASTRONOMY
(2019)
Article
Geochemistry & Geophysics
Yingwei Yan, Zhejiang Wang, Jing Li, Nan Huai, Yujia Zhang, Fei Han
JOURNAL OF GEOPHYSICS AND ENGINEERING
(2020)
Article
Geochemistry & Geophysics
Jing Li, Yuqing Chen, Gerard T. Schuster
GEOPHYSICAL PROSPECTING
(2020)
Article
Geochemistry & Geophysics
Zhaolun Liu, Jing Li, Sherif M. Hanafy, Kai Lu, Gerard Schuster
Article
Geochemistry & Geophysics
Jing Li, Yuqing Chen, Zhaofa Zeng
Summary: The study utilized lunar penetrating radar to examine the lunar surface structure, presenting a LSM algorithm to improve migration artifacts. Testing results showed that LSM method performs better than traditional methods, identifying clear strata reflections below the CE-3 site.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2021)
Article
Geochemistry & Geophysics
Jing Li, Lige Bai, Hai Liu
Summary: The LRPR carried by CE-5 has explored the lunar subsurface structure and guided sampling procedures, and a multiscale FWI method with TV regularization has been used to evaluate its performance. The strategy has successfully reduced signal scattering and provided reliable imaging for sampling, demonstrating improved inversion accuracy.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Energy & Fuels
Lige Bai, Jing Li, Zhaofa Zeng
Summary: This study investigates the anisotropic magnetotelluric (MT) response during water injection fracturing in hot dry rock (HDR) geothermal. The characteristics of fracture strike and dip angle are calculated using the residual phase tensor (PT) method. The results demonstrate that the MT method can explain the anisotropic resistivity structure changes caused by water injection, providing a reliable scientific basis for fracture distribution direction and spreading characteristics.
Article
Engineering, Chemical
Zongwei Yao, Hongxu Xu, Jing Li, Tianshuang Xu
Summary: This study conducted a multi-objective optimal design of stirring tanks using numerical simulation, surrogate model, NSGA-II, Entropy Weighting Method, and Analytic Hierarchical Process. The complex and time-consuming traditional design method was addressed to improve design efficiency. The accuracy of the simulation results was validated using computational fluid dynamics and Particle Image Velocimetry. The key parameters were predicted using a Kriging model established based on experimental designs using the Latin Hypercube method. The optimal solution obtained through NSGA-II optimization algorithm showed improved suspension uniformity by 0.7% and reduced power consumption by 48.3% compared to the initial design, as determined by the Analytic Hierarchy Process and Entropy Weighting Method.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Environmental Sciences
Jiahe Yan, Zhaofa Zeng, Xueyu Zhao, Baizhou An, Lige Bai, Jianwei Zhao, Jing Li
Summary: Grotto rock structure detection is crucial for the protection and restoration of grottoes. Electrical resistivity tomography (ERT) is commonly used for this purpose. However, the traditional ERT measurements face challenges in terms of accuracy and resolution in cliff regions. To address this, a new BSC-ERT scheme is proposed, which combines borehole-to-surface ERT and surface-to-cliff ERT using the AM-BN array configuration. Numerical experiments show that this combination yields better imaging effects and a more reasonable detection range, making it recommended for future work. It is also demonstrated that the symmetric effect generated in the AM-BN array in the BS-ERT scheme can be suppressed with the combination of the SC-ERT scheme.
Article
Geochemistry & Geophysics
Hui Liu, Jing Li, Yibo Wang
Summary: Distributed acoustic sensing (DAS) is a new seismic observation technique that can record strain rate data with high resolution and directly invert velocity structures, showing great potential for high-resolution velocity tomography.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Lige Bai, Jing Li, Zhaofa Zeng, Kun Wang
Summary: This paper develops a heat transfer adaptive finite-element equation parameter inversion workflow and applies it to the Gonghe Basin, providing a new method to reveal the distribution and formation mechanisms of geothermal resources.
Article
Geochemistry & Geophysics
Chunyu Ding, Jing Li, Rong Hu
Summary: The Moon-based ground-penetrating radar (GPR) onboard the Chang'E-4 (CE-4) Yutu-2 rover has deployed on the Moon's far side, providing an unprecedented opportunity to study the shallow surface geological process and the history of the volcanic eruption of the Moon. The high-frequency radar observed a buried lens structure similar to 27 m below the lunar surface, interpreted as paleoregolith by previous studies. Our quantitative analysis of the dielectric properties reveals that the buried lens structure is likely a basalt flow representing the latest volcanic eruption on the Moon, possibly from the Eratosthenian-aged volcano that occurred approximately 2.5-2.2 billion years ago.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geochemistry & Geophysics
Zhijun Huo, Ling Zhang, Zhaofa Zeng, Jing Li, Lin Li, Cai Liu
Summary: This article focuses on the importance of detecting the lunar underground structure and proposes a comprehensive lunar subsurface structure model. A set of processing flow is designed to interpret the detection data, including plane-wave destruction, velocity analysis, and migration imaging. The effectiveness of the imaging method is verified through forward modeling and validation experiments.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geochemistry & Geophysics
Chang Zhang, Jing Li, Han Yu, Bin Liu
Summary: Due to environmental variations and data acquisition inconsistencies, complex near-surface seismograms often have low SNR. This poses challenges for accurate first arrival identification in wave-equation traveltime inversion. In this article, an elastic WT inversion algorithm based on the autoencoder method (AEWT) is proposed to overcome these challenges. The AEWT method automatically extracts intrinsic features of refractions and provides more reliable and stable P-velocity tomograms.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geochemistry & Geophysics
Rong Hu, Jing Li, Li Guo
Summary: In this article, a time-lapse GPR data full-waveform inversion (FWI) method is proposed to effectively monitor the spatial distribution of small-scale fluid transport and estimate SWC with improved accuracy. The method combines velocity spectral analysis and the structural similarity index (SSIM) to construct a permittivity model and introduces gradient normalization to balance the convergence rate of the permittivity and conductivity parameters during the inversion process. The proposed method is validated using typical GPR field data, and the estimated error in SWC is found to be less than 5%. The time-lapse GPR data processing protocol provides a quantitative means for monitoring small-scale fluid infiltration.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
