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
Computer Science, Interdisciplinary Applications
Victor Jose Cavalcanti Bezerra Guedes, Susanne Taina Ramalho Maciel, Marcelo Peres Rocha
Summary: The open-source software package Refrapy, written in Python, allows for seismic refraction data analysis with basic waveform processing, first breaks picking, and inversion through time-terms analysis or traveltimes tomography, with GUI interaction. The software successfully recovered geometry and velocity values of synthetic models and provided a detailed interpretation through joint inversion techniques. Results from real data analysis showed compatibility with a well-established commercial software, representing geological context satisfactorily.
COMPUTERS & GEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Bo Bai, Cun Yang, Wenbo Sun
Summary: The seismic dip attribute is used for structural interpretation but current algorithms often do not consider the relationship between nearby samples. A new method based on analyzing seismic waveform features and dynamic time warping is proposed for simultaneous computation of dip values in seismic traces, showing effectiveness in field seismic data.
JOURNAL OF GEOPHYSICS AND ENGINEERING
(2021)
Article
Geochemistry & Geophysics
Yujin Liu, Yubo Yue, Youming Li, Yi Luo
Summary: This study investigates the types of seismic waves retrievable from HST-induced vibrations using seismic interferometry. Cross terms introduced during cross correlation are found to be nonnegligible for reflection-wave retrieval but negligible for direct waves, scattered waves, and refraction waves. Field data tests have validated this finding.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Zhennan Yu, Yang Liu
Summary: Migration Velocity Analysis (MVA) is an efficient tool to reconstruct low wavenumber components of the model, with methods like Differential Semblance Optimization (DSO) automatically detecting moveouts in Common Image Gathers (CIGs). However, traditional DSO methods may produce poor velocity updates due to imaging artifacts, prompting the introduction of an adaptive DSO (ADSO) method to improve stability and accuracy.
JOURNAL OF APPLIED GEOPHYSICS
(2022)
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
Veronica Rodriguez Tribaldos, Jonathan B. Ajo-Franklin
Summary: This study demonstrates a new method for tracking seismic velocity changes caused by groundwater level fluctuations using ambient seismic noise acquired on an unused fiber-optic cable in the Sacramento Valley, California. Results show that short-scale spatial variability in aquifer dynamics can be captured through this approach.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
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
Geochemistry & Geophysics
Paul Edigbue, Abdullatif Al-Shuhail, Sherif M. Hanafy
Summary: This paper proposes a semi-supervised target track recognition algorithm based on a semi-supervised generative adversarial network (SSGAN) which learns a robust model from a few labeled target track examples and deals with outliers in the data. The method achieves highly competitive target track recognition performance, with a minimum accuracy of 97% and a 15.7% improvement compared to state-of-the-art methods.
Article
Geochemistry & Geophysics
Xiaoyang Wu, Zhen Guo, Lanbo Liu, Yongshun John Chen, Changqiao Zou, Xiuqing Song
Summary: This study presents the first comprehensive seismological investigation of the Shanghai Tower, utilizing seismic interferometry to analyze ambient noise data. The research successfully identifies resonant modes of the building and observes diurnal variations in seismic velocities and mechanical responses correlated with temperature. The findings demonstrate the effectiveness of seismic ambient-noise interferometry for structural health monitoring and hazard assessment of super high-rise buildings globally.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Victor C. Tsai, Korbinian Sager
Summary: This study demonstrates the use of Bayesian inference approach in calculating the expected cross correlation of seismic signals, leading to a better understanding of its relationship with the Green's function. The Bayesian derivation replicates the equipartition result, and with stronger constraints, deviation from the expected Green's function is observed, allowing for more reliable comparison with observations.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
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
Geosciences, Multidisciplinary
Sizhuang Deng, Alan Levander
Summary: This study used autocorrelation analysis on Mars seismic data to identify reflection signals from subsurface structures, confirming the presence of the olivine-wadsleyite transition and core-mantle boundary in Mars. By removing instrumental glitches, the research provides more accurate insights into the Martian subsurface structures.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Yujin Liu, Yubo Yue, Yi Luo, Youming Li
Summary: Train traffic, especially high-speed trains, is recognized as a powerful noise source for subsurface imaging and monitoring. This study investigates the effects of train traffic characteristics on seismic interferometry, finding that using high-speed train traffic noise can generate crosstalk that is effectively attenuated by stacking interferometric results. The study demonstrates that retrieved surface waves from this method can be used to estimate near-surface velocities.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2021)
Article
Geochemistry & Geophysics
Takashi Hirose, Hideki Ueda, Eisuke Fujita
Summary: Continuous estimation of changes in seismic velocity and seismic scattering properties using passive interferometry is a promising tool for monitoring volcanoes. In this study, we applied this method to seismic records from the Suwanosejima volcano and found significant changes in seismic scattering properties prior to an increase in volcanic explosions. The synchronization between these changes and tilt changes related to magma accumulation suggests a strong correlation between the amount of accumulated magma and the changes in scattering properties.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geosciences, Multidisciplinary
J. Umlauft, F. Lindner, P. Roux, T. D. Mikesell, M. M. Haney, M. Korn, F. T. Walter
Summary: Recent seismic observations challenge the traditional view of glacial ice sliding over a frictionless or slowly deforming bed, showing evidence of stick-slip motion at the ice-bed interface. By analyzing seismic tremors on Gornergletscher, Switzerland, researchers have identified evidence of superimposed stick-slip episodes as tremor sources, suggesting widespread seismogenic glacier sliding.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Lee M. Liberty, Zachery M. Lifton, T. Dylan Mikesell
Summary: This article discusses the tectonic framework, seismicity, and aftershock monitoring efforts related to the 6.5 magnitude earthquake in Stanley, Idaho on March 31, 2020. It highlights the possible kinematic link between different fault systems in the region and the historical seismicity patterns in Idaho. The ongoing seismic monitoring efforts are expected to lead to a better understanding of the ground shaking potential and active fault characteristics in the area.
SEISMOLOGICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Zongbo Xu, Ludovic Margerin, T. Dylan Mikesell
Summary: Seismic coda waves are commonly used for estimating subsurface Q values and monitoring subsurface changes. A Monte Carlo algorithm is proposed to model the multiple scattering process and better understand the interaction between body and surface waves, which leads to accurate energy evolution in space and time.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Engineering, Aerospace
Florian Zedek, Lucie M. Rolland, T. Dylan Mikesell, Anthony Sladen, Bertrand Delouis, Cedric Twardzik, Pierdavide Coisson
Summary: The study evaluates the capability of a single GNSS station to constrain the origin location of coseismic ionospheric disturbances (CID) through observations of Total Electron Content (TEC). It confirms that increasing the number of monitoring satellites helps in resolving CID origins. By using TEC data from earthquakes of different moment magnitudes, the research shows that a well-placed multi-GNSS station can accurately retrieve the origin of CID with a high level of precision.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
E. Astafyeva, B. Maletckii, T. D. Mikesell, E. Munaibari, M. Ravanelli, P. Coisson, F. Manta, L. Rolland
Summary: In this study, data from ground-based receivers of the Global Navigation Satellite System are analyzed to explore the ionospheric response to the eruption of the Hunga Tonga-Hunga Ha'apai submarine volcano. The ionospheric response is shown to consist of a significant increase in total electron content (TEC) followed by a strong and long-lasting depletion. The energy released during the main explosion is estimated based on the ionospheric TEC data.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Multidisciplinary Sciences
Robin S. Matoza, David Fee, Jelle D. Assink, Alexandra M. Iezzi, David N. Green, Keehoon Kim, Liam Toney, Thomas Lecocq, Siddharth Krishnamoorthy, Jean-Marie Lalande, Kiwamu Nishida, Kent L. Gee, Matthew M. Haney, Hugo D. Ortiz, Quentin Brissaud, Leo Martire, Lucie Rolland, Panagiotis Vergados, Alexandra Nippress, Junghyun Park, Shahar Shani-Kadmiel, Alex Witsil, Stephen Arrowsmith, Corentin Caudron, Shingo Watada, Anna B. Perttu, Benoit Taisne, Pierrick Mialle, Alexis Le Pichon, Julien Vergoz, Patrick Hupe, Philip S. Blom, Roger Waxler, Silvio De Angelis, Jonathan B. Snively, Adam T. Ringler, Robert E. Anthony, Arthur D. Jolly, Geoff Kilgour, Gil Averbuch, Maurizio Ripepe, Mie Ichihara, Alejandra Arciniega-Ceballos, Elvira Astafyeva, Lars Ceranna, Sandrine Cevuard, Il-Young Che, Rodrigo De Negri, Carl W. Ebeling, Laslo G. Evers, Luis E. Franco-Marin, Thomas B. Gabrielson, Katrin Hafner, R. Giles Harrison, Attila Komjathy, Giorgio Lacanna, John Lyons, Kenneth A. Macpherson, Emanuele Marchetti, Kathleen F. McKee, Robert J. Mellors, Gerardo Mendo-Perez, T. Dylan Mikesell, Edhah Munaibari, Mayra Oyola-Merced, Iseul Park, Christoph Pilger, Cristina Ramos, Mario C. Ruiz, Roberto Sabatini, Hans F. Schwaiger, Dorianne Tailpied, Carrick Talmadge, Jerome Vidot, Jeremy Webster, David C. Wilson
Summary: The eruption of the Hunga volcano in Tonga on 15 January 2022 caused an explosion in the atmosphere, generating a range of atmospheric waves that were observed globally. The eruption produced significant infrasound, audible sound, and ionospheric perturbations, and contributed to the occurrence of tsunamis. The exceptional observations of the atmospheric waves are highlighted in this study.
Article
Geochemistry & Geophysics
Thomas Dylan Mikesell, Aurelien Mordret, Zongbo Xu, William B. Frank
Summary: This study used seismic data from the Polar Earth Observing Network to compute the correlation tensor between Antarctic stations, extracting Rayleigh and Love wave velocity information. Using tomography and inversion algorithms, a 2D isotropic shear-wave velocity model was built, revealing a low-velocity zone beneath Marie Byrd Land and a velocity contrast in the lower crust. The findings have important implications for earthquake research and hypocenter estimation in the region.
SEISMOLOGICAL RESEARCH LETTERS
(2022)
Article
Geochemistry & Geophysics
Zongbo Xu, T. Dylan Mikesell
Summary: Estimating the distribution and characteristics of seismic sources from ambient seismic waves is an important problem. The commonly used methods, matched field processing and full waveform inversion, have differences in model resolution and uncertainty, which need to be further studied and compared.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Jonathan Simpson, Kasper van Wijk, Ludmila Adam, Lionel Esteban
Summary: Research shows that rocks exhibit a decrease in elastic modulus during acoustic perturbation, followed by a logarithmic recovery to the original value. This paper investigates nonlinear elasticity in rocks through temperature perturbations and laboratory experiments. The study finds that temperature changes induce changes in ultrasonic velocity, and a modified model explains the observations based on the shearing and recreation of internal microscopic contacts.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Mayara F. Cizina, T. Dylan Mikesell, Matthew J. Kohn
Summary: Raman spectroscopy is commonly used to identify mineral and fluid inclusions in host crystals and calculate pressure-temperature conditions for thermobarometric applications. This study aims to determine the reproducibility of Raman peak position measurements for quartz and zircon inclusions, as well as to identify optimal measurement conditions. The results provide important insights for interlaboratory comparisons and improve the accuracy of elastic thermobarometry.
AMERICAN MINERALOGIST
(2023)
Article
Geosciences, Multidisciplinary
M. Ravanelli, E. Astafyeva, E. Munaibari, L. Rolland, T. D. Mikesell
Summary: We investigate the oceanic and ionospheric response to the Hunga-Tonga volcanic eruption in New Caledonia-New Zealand and Chile-Argentina. We observe a reversed response in terms of the amplitudes, with the ionospheric perturbation being considerable while the sea-surface fluctuations were not remarkable. The eruption-induced tsunami caused major variations in sea-surface heights, while the associated ionospheric perturbation was quite small. We estimate a delay of approximately 12-20 minutes between the Lamb waves and their signatures in the ionosphere.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
Shin-Chan Han, Simon McClusky, T. Dylan Mikesell, Lucie Rolland, Emile Okal, Craig Benson
Summary: Multiple passages of atmospheric waves were observed after the HTHH volcanic eruption, perturbing the ionosphere and producing TIDs. New observations of TIDs at high altitudes (>550 km) were made using CubeSat GPS tracking data, which provided complementary information to ground receivers due to their larger spatial coverage over a shorter period of time. The TIDs traveled globally and reached high altitudes, indicating a speed of approximately 350 m/s.
EARTH AND SPACE SCIENCE
(2023)
Proceedings Paper
Computer Science, Hardware & Architecture
Ravi Shankar, Aaron Orenstein, Anna Rift, Tobi Popoola, MacDonald Lowe, Shuai Yang, T. Dylan Mikesell, Catherine Olschanowsky
Summary: Scientific applications contain valuable scientific knowledge, but they need to be adapted and extended as hardware evolves. Visual representation of dataflow can help solve performance problems and dead code. This paper presents a case study using the Computation API of the sparse polyhedral framework to optimize scientific applications.
LANGUAGES AND COMPILERS FOR PARALLEL COMPUTING (LCPC 2021)
(2022)
Article
Geology
D. Malytskyy, D. Mikesell
Summary: The paper presents a method for moment tensor inversion using only direct P-waves, which are less sensitive to path effects than other types of waves, leading to improved accuracy and reliability. The approach is based on a point-source approximation model and utilizes forward modeling to develop a numerical technique for inversion of observed waveforms to obtain the time history of moment tensor components M(t) through generalized inversion.
VISNYK OF TARAS SHEVCHENKO NATIONAL UNIVERSITY OF KYIV-GEOLOGY
(2021)
Article
Geochemistry & Geophysics
Lee M. Liberty, James St Clair, T. Dylan Mikesell, William D. Schermerhorn
Summary: This study introduces a novel approach to estimate primary site-response resonance, layer thickness, and shear-wave velocity directly from dispersion images, eliminating the need for time-consuming dispersion curve picking. It can be applied to shallow soil conditions and high-impedance boundaries, providing model constraints for complex velocity structures.
BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA
(2021)
