Article
Geosciences, Multidisciplinary
Francisco J. Chavez-Garcia, Thulasiraman Natarajan, Martin Cardenas-Soto, Kusala Rajendran
Summary: Intense monsoon rains in 2018 triggered landslides in the Western Ghats region of India, causing significant damage. A case study on two landslides used seismic prospecting to characterize them, showing similar results with different analyses and correlations between shear-wave velocity distribution and seismic noise characteristics. The study suggests that soil thickness played a major role in the landslides' triggering.
Article
Geosciences, Multidisciplinary
Nikita Afonin, Elena Kozlovskaya, Raul Mollehuara
Summary: Obtaining knowledge about the conditions of mining waste storage facilities is crucial for mining waste management. This study demonstrates the use of passive seismic interferometry to evaluate seismic velocities in the facilities and surrounding bedrock. The method utilizes ambient seismic noise and allows for the inspection of active mine sites where traditional seismic techniques are limited.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Environmental Sciences
Eldert Fokker, Elmer Ruigrok, Rhys Hawkins, Jeannot Trampert
Summary: This study develops a physics-based model to explain how fluctuations in groundwater table and pore pressure affect seismic velocity variations. The results demonstrate that this model can be used for monitoring pore pressure and effectively predict changes in seismic velocity.
Article
Geochemistry & Geophysics
Joshua Boschelli, Morgan P. Moschetti, Christoph Sens-Schonfelder
Summary: This study investigates seismic velocity changes associated with the 2019 Ridgecrest earthquake sequence using high-frequency autocorrelations of ambient seismic noise data. The results show that seismic velocity changes are largely due to fault zone damage recovery caused by the earthquake rupture process and in response to the large dynamic stresses of passing seismic waves from the mainshock. The absolute changes in seismic velocity are proportional to the logarithm of distance from the fault rupture, with stations further away experiencing smaller changes.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Astronomy & Astrophysics
D. Arosio, A. Aguzzoli, L. Zanzi, L. Panzeri, D. Scaccabarozzi
Summary: This study evaluates the performance of a low-cost 3-component seismometer through laboratory tests and field surveys. The results show that the seismometer has good frequency response and timing accuracy.
EARTH AND SPACE SCIENCE
(2023)
Article
Geochemistry & Geophysics
Xujia Shang, Pan Zhang, Liguo Han, Yuanyun Yang, Yixiu Zhou
Summary: Traditional full waveform inversion (FWI) relies heavily on low-frequency data or accurate initial models. Passive seismic data, which contain abundant low-frequency components, can be effectively used for FWI through virtual source data obtained by seismic interferometry (SI). Inhomogeneous distribution of passive sources in the subsurface leads to artifacts in the reconstruction results using cross-correlation based SI. In this study, an improved SI method based on linear Radon transform-based MDD (LRTMDD) is proposed to mitigate this issue and achieve better reconstruction results.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geochemistry & Geophysics
N. L. Bennington, S. J. Ohlendorf, C. H. Thurber, M. M. Haney
Summary: This study uses ambient noise interferometry to investigate temporal changes in seismic velocity at Okmok volcano in Alaska during the inter-eruptive period between two eruptions. The depth-constrained changes in seismic velocity distinguish volcanic and non-volcanic processes, and theoretical volumetric strain modeling of volcanic deformation is also conducted. The joint analysis technique developed in this study allows for the determination of volcanic deformation location, with potential implications for monitoring active magma storage at sparsely instrumented volcanoes worldwide.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Flavio Poletto, Alex Goertz, Cinzia Bellezza, Endre Vange Bergfjord, Piero Corubolo, John Even Lindgard, Lars Martin Moskvil
Summary: Seismic-while-drilling (SWD) has been successfully used in onshore applications, but due to logistical and cost reasons, it is more challenging to apply offshore. Researchers have developed a novel approach that uses predeployed passive-monitoring sea-bottom nodes to record offshore SWD data effectively. A pilot test in the Barents Sea demonstrated the effectiveness of this method and its potential for real-time monitoring and prediction of drilling progress.
Article
Geochemistry & Geophysics
Michal Chamarczuk, Michal Malinowski, Deyan Draganov, Emilia Koivisto, Suvi Heinonen, Sanna Rotsa
Summary: This study applies full-scale 3D seismic virtual-source survey (VSS) for near-mine mineral exploration, using ambient noise data for analysis and imaging. The results demonstrate the capability of VSS in providing high-quality geological images in areas with terrain restrictions.
Article
Geochemistry & Geophysics
Ruth A. Beckel, Christopher Juhlin
Summary: Passive reflection seismic interferometry (PRSI) faces challenges in imaging the subsurface structure due to the difficulty in meeting the illumination requirements, which can introduce artefacts in the results. The study found that dipping reflectors have a significant impact on the results, with contributions mainly from the hangingwall and weak and kinematically incorrect contributions from the footwall. The type and position of artefacts depend on source azimuth and modelling type, and it is crucial to distinguish between meaningful reflections and artefacts during interpretation.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
Xiannan Wang, Jian Zhang, Cean Guo, Shuang Zhao, Hao Cheng
Summary: A new method for retrieving virtual-source gathers in linear Radon domain using seismic interferometry was explored. It involves selecting traces with the same ray parameters to save computation time, with significant practical significance in processing noise passive data.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geochemistry & Geophysics
Patipan Saengduean, Morgan P. Moschetti, Roel Snieder
Summary: Seismic interferometry is a widely used technique for retrieving wavefields between receivers and can be extended to retrieve waves between two seismic sources, known as inter-source interferometry. The accuracy of estimating P-waves between two sources using this method is dependent on the accuracy of the earthquake catalog. Using inter-source interferometry, direct body waves and potentially coda waves can be recovered accurately under certain conditions.
PURE AND APPLIED GEOPHYSICS
(2021)
Article
Geochemistry & Geophysics
Yang Lu, Helle A. Pedersen, Laurent Stehly
Summary: The study reveals that the noise field in Europe is mainly dominated by surface waves from the North Atlantic Ocean, with a significant additional contribution from the eastern part of the Mediterranean Sea in summer. The relative contributions of the primary and secondary microseismic peaks are frequency-dependent, showing variations in different seasons.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Thanop Thitimakorn, Rungroj Arjwech, Sasikan Kupongsak
Summary: The shear-wave velocity (Vs) of soils in Nakhon Nayok City, Central Thailand were determined using the Multi-Channel Analysis of Surface Wave technique. The results showed that the city has NEHRP site classes C, D, and E, with soil class C found in the north and most of the residential area positioned on soil classes D and E. The amplification value of the soil in the study area ranged from 1.4 to 3.9, with higher values in the central and southwestern parts which consist of soft sediments.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Fengjiao Zhang, Zhuo Xu, Christopher Juhlin, Monika Ivandic, Liguo Han, Pan Zhang
Summary: This study compares several passive seismic interferometry imaging methods and applies them to the data set acquired at Ketzin. The passive sections obtained using autocorrelation show good agreement with the active stacked sections, while the sections obtained by processing virtual shot gathers using crosscorrelation exhibit poorer coherence in the reflections and more noise.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
Article
Geochemistry & Geophysics
Feng Cheng, Jianghai Xia, Zongbo Xu, Jonathan B. Ajo-Franklin
Summary: Passive seismic methods, specifically linear arrays, are being widely used in highly populated urban areas. These methods commonly include non-interferometric and interferometric techniques. While the interferometric methods have been proven to be effective in retrieving Green's function between inter-station pairs, there is a lack of theoretical proof for the accuracy of non-interferometric methods. This study aims to provide a comprehensive comparison and theoretical understanding of both types of methods in different noise source environments.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Geochemistry & Geophysics
Zack J. Spica, Jonathan Ajo-Franklin, Gregory C. Beroza, Biondo Biondi, Feng Cheng, Beatriz Gaite, Bin Luo, Eileen Martin, Junzhu Shen, Clifford Thurber, Loic Viens, Herbert Wang, Andreas Wuestefeld, Han Xiao, Tieyuan Zhu
Summary: DAS has become a valuable tool for recording seismic wavefields, but the large amount of data generated limits their distribution. PubDAS is the first large-scale open-source repository sharing multiple DAS datasets from various geological settings, covering days to years of recordings totaling up to around 90 TB of data. This article introduces the datasets, their metadata, and access/download instructions. Some datasets remain unexplored, providing potential for new discoveries in Earth sciences and beyond.
SEISMOLOGICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
J. Shi, M. Plasman, B. Knapmeyer-Endrun, Z. Xu, T. Kawamura, P. Lognonne, S. M. McLennan, G. Sainton, W. B. Banerdt, M. P. Panning, T. Wang
Summary: Researchers used high signal-to-noise ratio seismic data to reveal a 2-km depth discontinuity in the shallow structure of Mars, which separates highly fractured and more coherent crustal materials.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Zongbo Xu, Adrien Broquet, Nobuaki Fuji, Taichi Kawamura, Philippe Lognonne, Jean-Paul Montagner, Lu Pan, Martin Schimmel, Eleonore Stutzmann, William Bruce Banerdt
Summary: Understanding the Martian crust and uppermost mantle is crucial for studying the planet's evolution, and NASA's InSight mission has provided seismic data to reveal the interior structure. While most studies have focused on the crustal structure beneath the InSight lander, the seismic structure of other regions remains poorly known. This study investigates the crustal structure along the Medusa Fossae Formation and the dichotomy using surface-wave data, and the findings suggest the presence of a high-velocity layer and a common intra-crustal structure in this region.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
S. Menina, L. Margerin, T. Kawamura, G. Heller, M. Drilleau, Z. Xu, M. Calvet, R. F. Garcia, B. Knapmeyer-Endrun, S. Carrasco, K. Onodera, P. Lognonne, A. Stott, W. B. Banerdt
Summary: We modeled the high-frequency seismogram envelopes of large event S1222a and four near impacts recorded by the InSight mission by introducing velocity and attenuation stratification. A simple conceptual model consisting of a diffusive, weakly attenuating layer overlying a transparent medium captures the essential features of the observed envelopes. The attenuation profiles suggest minimal heterogeneities extension at depths of about 20 km near InSight and 60 km on the path to S1222a, indicating the Martian crust as the origin of strong scattering. Our heterogeneity model suggests that the sources of distant Very-high-Frequency seismic events are located shallow and to the south or in close vicinity of the Martian dichotomy.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Feng Cheng, Jianghai Xia, Chaoqiang Xi
Summary: Passive surface wave methods are effective and cost efficient for imaging near-surface shear-wave velocity using passive seismic sources. However, artifacts in dispersion measurements are common and can seriously affect the accuracy of the results. This review provides a comprehensive analysis of the different types of artifacts and offers potential solutions to mitigate their impact.
SURVEYS IN GEOPHYSICS
(2023)
Article
Geochemistry & Geophysics
Feng Cheng, Jonathan B. Ajo-Franklin, Avinash Nayak, Veronica Rodriguez Tribaldos, Robert Mellors, Patrick Dobson
Summary: We utilize distributed acoustic sensing (DAS) and ambient noise interferometry to image the geothermal reservoirs in Imperial Valley, California, using unlit fiber-optic telecommunication infrastructure (dark fiber). By applying ambient noise interferometry to DAS records, we obtain a high-resolution two-dimensional (2D) S wave velocity (V-s) structure to a depth of 3 km. We discover a high V-s and low V-p/V-s ratio feature beneath the Brawley geothermal system, indicating hydrothermal mineralization and lower porosity.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Computer Science, Interdisciplinary Applications
Zhong Peng, Bo Yang, Lian Liu, Yixian Xu
Summary: The magnetotelluric (MT) forward modeling problem is computationally slow due to the large scale of the algebraic system solving process. To improve efficiency, a physics-driven model (PDM) using deep neural networks (DNNs) as a surrogate is proposed. The PDM shows excellent agreement with the finite-difference method (FDM) in predicting MT responses and has a much faster computing speed.
COMPUTERS & GEOSCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Wanbo Xiao, Taichi Kawamura, Zongbo Xu, Sebastian Carrasco, Keisuke Onodera, Gregory Sainton, Philippe Lognonne, Yanbin Wang, Brigitte Knapmeyer-Endrun, William Bruce Banerdt
Summary: This study investigates the corner frequency of S1222a and finds that its spectra deviate from the classical ω^2 model, likely due to the site effect at the InSight landing site. Numerical simulation shows that considering the site effect greatly improves the spectral fitting. The source spectrum and stress drop of S1222a are estimated, revealing a different tectonic origin from the Cerberus Fossae marsquakes.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
Sebastian Carrasco, Brigitte Knapmeyer-Endrun, Ludovic Margerin, Zongbo Xu, Rakshit Joshi, Martin Schimmel, Eleonore Stutzmann, Constantinos Charalambous, Philippe Lognonne, W. Bruce Banerdt
Summary: We measured the ellipticity of direct Rayleigh waves at intermediate periods (15-35 s) on Mars using recordings of three large seismic Martian events, including the largest event recorded by the InSight mission. These measurements, along with other seismic data, were used to determine the local crustal structure at the InSight landing site. The results suggest the presence of crustal discontinuities at depths around 10 km, 20 km, and a strong discontinuity at approximately 37 km, interpreted as the crust-mantle interface, as well as a shallow low-velocity layer of 2-3 km thickness.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Jing Shi, Tao Wang, Han Chen, Minghan Yang, Ling Chen, Hejiu Hui, Zongbo Xu, Philippe Lognonne, Taichi Kawamura
Summary: The scattering properties of Earth, Mars, and the Moon's shallow crusts were investigated by constructing P-wave receiver functions (PRFs) from teleseismic waveforms. The analysis revealed that strong coda waves led to variations in the PRF waveforms, and the stability of the PRF was primarily influenced by the fractional velocity fluctuation. Synthetic PRFs confirmed these observations, and it was found that the fractional velocity fluctuation was greater for the Moon than for Earth and Mars, possibly due to differences in water content.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geochemistry & Geophysics
Feng Cheng, Jonathan B. Ajo-Franklin, Veronica Rodriguez Tribaldos
Summary: This study utilizes distributed acoustic sensing (DAS) technique to characterize near-surface structure and site response in Imperial Valley using dark fiber. High-resolution Vs structure and improved Vs30 model are obtained through analysis of DAS records of ambient noise and local earthquake events, providing valuable information for seismic hazard assessment and ground motion prediction.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Energy & Fuels
Hongyan Wang, Zhensheng Shi, Shasha Sun, Qun Zhao, Tianqi Zhou, Feng Cheng, Wenhua Bai
Summary: The types, characteristics, and models of microfacies in the Wufeng-Silurian Longmaxi shale in southern Sichuan Basin, China are analyzed. The microfacies are closely related to sedimentation, tectonic setting, paleoclimate, and sea level rise.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2023)
Article
Geosciences, Multidisciplinary
Sebastian Carrasco, Brigitte Knapmeyer-Endrun, Ludovic Margerin, Zongbo Xu, Rakshit Joshi, Martin Schimmel, Eleonore Stutzmann, Constantinos Charalambous, Philippe Lognonne, W. Bruce Banerdt
Summary: In this study, we measured the ellipticity of direct Rayleigh waves at intermediate periods on Mars for the first time. These measurements, along with other seismic data, were used to infer the local crustal structure at the InSight landing site. Our results suggest the presence of intra-crustal discontinuities and a strong crust-mantle interface at around 37 km depth. We also found a shallow low-velocity layer of 2-3 km thickness. The lower seismic wave velocities in the crust compared to nearby regions indicate a higher porosity or alteration of the local crust.
GEOPHYSICAL RESEARCH LETTERS
(2023)
