Structural uncertainty and geophysical data fusion: A synthetic example by Kane, Jonathan, Rodi, William, Nemeth, Tamas, Mikhailov, Oleg

“…We attempt to address two issues in seismic data processing: 1) quantifying the various forms of error that enter into the seismic data processing work-flow and relating them to uncertainty on imaged structures; and, 2) the data fusion problem, i.e. combining different sources of information, each related to seismic velocity. To begin addressing these issues a synthetic model was generated consisting of 4 tilted layers (3 interfaces), each with a different isotropic P-wave velocity. …”
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Toward consistent seismological models of the core–mantle boundary landscape by Koelemeijer, P

“…While most density models image two areas of dense anomalies beneath Africa and the Pacific, their exact location and relationship to seismic velocity structure differs. CMB topography strongly influences the retrieved density structure, helping to resolve differences between existing studies. …”

Magmatic System and Seismicity of the Arxan Volcanic Group in Northeast China by Jie Li, You Tian, Dapeng Zhao, Dong Yan, Zhiqiang Li, Hongli Li

“…The melt fraction of a magma chamber below the Tianchi volcano at ∼0–8 km depths is estimated to be ∼6.1%–8.6% from the seismic velocity reductions. Our results indicate that the Arxan magmatic system is still active at present.…”
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Broad fault zones enable deep fluid transport and limit earthquake magnitudes by Konstantinos Leptokaropoulos, Catherine A. Rychert, Nicholas Harmon, David Schlaphorst, Ingo Grevemeyer, John-Michael Kendall, Satish C. Singh

“…These features are characterised by multiple parallel fault segments and step overs, higher proportions of smaller events, gaps in large historical earthquakes, and seismic velocity structures consistent with hydrothermal alteration. …”
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2‐D Analytical P‐to‐S and S‐to‐P Scattered Wave Finite Frequency Kernels by Nicholas Harmon, Catherine A. Rychert, Yujiang Xie, Petros Bogiatzis

“…Finally, we demonstrate the ability of the kernels to recover seismic velocity discontinuities with a variety of shapes including a flat discontinuity, a discontinuity with a sharp step, a discontinuity with a smooth bump, and an undulating discontinuity. …”
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Separation of Poroelastic and Elastic Processes of an Aquifer From Tectonic Phenomena Using Geodetic, Seismic, and Meteorological Data in the Pollino Region, Italy by Andrés Barajas, Piero Poli, Nicola D'Agostino, Ludovic Margerin, Michel Campillo

“…Comparisons between these variables allow us to clearly identify the period of the seismic activity in the zone, which is represented by the characteristic drop in the seismic velocity in the period from the beginning of 2012 to mid‐2013.…”
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Tilt Corrections for Normal Mode Observations on Ocean Bottom Seismic Data, an example from the PI-LAB experiment by Nicholas Harmon, Gabi Laske, Wayne Crawford, Catherine Rychert

“…This suggests incorporating ocean bottom normal mode measurements into global inversions will improve models of global seismic velocity structure. …”
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Lithospheric elastic thickness estimates in central Eurasia by Mehdi Eshagh, Martin Pitoňák, Robert Tenzer

“…Resulting expressions describe a functional relation between gravity field quantities and mechanical properties of the lithosphere, namely Young’s modulus and Poisson’s ratio that are computed from seismic velocity models in prior of estimating the lithospheric elastic thickness. …”
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Ambient Seismic Noise and Microseismicity Monitoring of a Prone-To-Fall Quartzite Tower (Ormea, NW Italy) by Chiara Colombero, Alberto Godio, Denis Jongmans

“…No irreversible modifications in the measured seismic parameters (i.e., natural resonance frequencies of the tower, seismic velocity changes, rupture-related microseismic signals) were detected in the monitored period, and no permanent displacement was observed at the tower top. …”
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Methodology for Evaluating the North Atlantic Igneous Province Reveals Multiple Hotspots at Breakup by Max Rohrman

“…Mechanisms are addressed combining trace element and seismic velocity data as a proxy for excess mantle potential temperature (ΔTp), using simple mantle melting models. …”
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Variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone by Wen-Bin Doo, Chung-Liang Lo, Yin-Sheng Huang, Wen-Nan Wu, Shiou-Ya Wang

“…To gain new insights into the spatial variations in the crustal structure and strength of plate coupling along the Ryukyu subduction zone, in the present study, based on three P-wave seismic velocity profiles, we construct density models for 2-D gravity modeling. …”
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Reply to Comment by A. Argnani on “Geometry of the Deep Calabrian Subduction From Wide‐Angle Seismic Data and 3‐D Gravity Modeling” by David Dellong, Frauke Klingelhoefer, Anke Dannowski, Heidrun Kopp, Shane Murphy, David Graindorge, Lucia Margheriti, Milena Moretti, Giovanni Barreca, Luciano Scarfì, Alina Polonia, Marc‐Andre Gutscher

“…Abstract Andrea Argnani in his comment on Dellong et al. (2020, https://doi.org/10.1029/2019gc008586) (Geometry of the deep Calabrian subduction (Central Mediterranean Sea) from wide‐angle seismic data and 3‐D gravity modeling) proposes an alternate interpretation of the wide‐angle seismic velocity models presented by Dellong et al. (2018, https://doi.org/10.1002/2017JB015312) and Dellong et al. (2020) and proposes a correction of the literature citations in these paper. …”
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Upper mantle melt caused by a subducted slab in the Indian-Eurasian continental subduction zone by Guohui Li, Yuanze Zhou, Ling Bai, Yuan Gao, Yanan Li

“…Here, we image the seismic velocity around the mantle transition zone by matching synthetic and observed triplicated seismic P and sP waveforms in the Indian–Eurasian continental subduction zone. …”
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Amphibole's Influence on Mid‐Lithosphere Discontinuity: Insights From Electrical Conductivity by Kewei Shen, Duojun Wang, Rui Zhang, Guangchao Chen, Kenan Han, Peng Chen, Ruixin Zhang, Zhiqing Zhang

“…Comparison of the geophysical observations with the electrical structure profiles calculated from this study constrained the amphibole contents of 20%–29% in MLDs in North China and South Australia, which may induce a 2.2%–3.1% reduction in seismic velocity.…”
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Mapping the Lithosphere and Asthenosphere Beneath Alaska With Sp Converted Waves by Isabella Gama, Karen M. Fischer, Junlin Hua

“…Abstract We obtained a 3D image of crust and mantle seismic velocity gradients beneath the state of Alaska using common‐conversion point (CCP) stacking of S‐to‐p converted body waves recorded by hundreds of stations from the NSF EarthScope Transportable Array and other portable arrays and permanent networks. …”
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A PRACTICAL IMPLEMENTATION OF ACOUSTIC FULL WAVEFORM INVERSION ON GRAPHICAL PROCESSING UNITS by Sergio-Alberto Abreo-Carrillo, Ana-B Ramirez, Oscar Reyes, David-Leonardo Abreo-Carrillo, Herling González-Alvarez

“…Recently, Full Waveform Inversion (FWI) has gained more attention in the exploration geophysics community as a data fitting method that provides high-resolution seismic velocity models. Some of FWI essential components are a cost function to measure the misfit between observed and modeled data, a wave propagator to compute the modeled data and an initial velocity model that is iteratively updated until an acceptable decrease of the cost function is reached. …”
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Systematic Mapping of Upper Mantle Seismic Discontinuities Beneath Northeastern North America by Yiran Li, Vadim Levin, Alex Nikulin, Xiaoran Chen

“…We also find numerous converting boundaries that reflect changes in directional variation (anisotropy) of seismic velocity, indicating complexity of rock texture in the upper mantle. …”
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A synthetic study of acoustic full waveform inversion to improve seismic modelling of firn by Emma Pearce, Adam D. Booth, Sebastian Rost, Paul Sava, Tuğrul Konuk, Alex Brisbourne, Bryn Hubbard, Ian Jones

“…The firn structure can be evaluated from depth models of seismic velocity, widely obtained with Herglotz-Wiechert inversion (HWI), an approach that considers the slowness of refracted seismic arrivals. …”
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Seismic structure of the 2015 Mw7.8 Gorkha earthquake revealed by ambient seismic noise and teleseismic surface wave tomography by Ziqiang Lü, Jianshe Lei, Qinghan Kong, Qian Liu, Jingwen Sun

“…These observations may indicate that seismic velocity heterogeneity could play an essential role in earthquake initiation and the rupture process.…”
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Empirical Relationship between Three Geotechnical Properties Obtained in Three Sites in Kerbala City, Iraq by Ammar Al-Khafaji

“…These parameters have been calculated for more than 2034 samples from the earth's surface and up to 15 m, which used seismic velocity values in calculating these properties by the international old equations. …”
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