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Ambient Seismic Noise Tomography Within the Floridan Aquifer System, Santa Fe River-Sink Rise, Florida, US J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-14 Jacob Alexander Gochenour, Susan L. Bilek, Han Byul Woo, Andrew J. Luhmann, Ronni Grapenthin, Jonathan B. Martin
This study utilized ambient seismic noise tomography to investigate correlations of hydrogeological systems with heterogeneous porosity with the internal velocity structure of karst aquifers using the Floridan Aquifer System (FAS) as an example. We conducted a seismic signal analysis with 30 days of vertical component seismic data acquired within the Santa Fe River Sink-Rise system (Sink-Rise System)
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Improved GRACE-FO Gravity Field Solution by Combining Different Accelerometer Transplant Products J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-12 Yufeng Nie, Yunzhong Shen, Jianli Chen, Qiujie Chen
Gravity field solutions determined from the Gravity Recovery and Climate Experiment Follow-on (GRACE-FO) are affected by the unexpected performance degradation of one accelerometer onboard, which is circumvented by the accelerometer data transplant (ACT) technique. Three operational ACT products are presently available: JPL-ACT and JPL-ACH from NASA Jet Propulsion Laboratory (JPL) and TUG-ACT from
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A Frequency Domain Methodology for Quantitative Evaluation of Diffuse Wavefield With Applications to Seismic Imaging J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-11 Bo Yang, Haoran Meng, Ning Gu, Xin Liu, Xiaofei Chen, Yehuda Ben-Zion
Ambient Noise Imaging (ANI) of subsurface structures relies on seismic interferometry of diffuse seismic wavefields. However, the lack of effective methods to quantify and identify highly diffuse waves hampers applications of ANI, particularly in evaluating seismic attenuation and monitoring structural changes with high temporal resolution. Conventional ANI approaches require data normalization, which
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Stresses Induced by Magma Chamber Pressurization Altered by Mechanical Layering and Layer Dip J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-11 Matías Clunes, John Browning, Jorge Cortez, José Cembrano, Carlos Marquardt, Janine L. Kavanagh, Agust Gudmundsson
Understanding the stress distribution around shallow magma chambers is vital for forecasting eruption sites and magma propagation directions. To achieve accurate forecasts, comprehensive insight into the stress field surrounding magma chambers and near the surface is essential. Existing stress models for pressurized magma chambers often assume a homogenous elastic half-space or a heterogeneous crust
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On the Relative Importance of Buoyancy and Thickening of Aging Lithosphere in Mantle Upwelling and Crustal Production Beneath Global Mid-Ocean Ridge System J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-10 Caicai Zha, Fan Zhang, Jian Lin, Tao Zhang, Jinyu Tian
Beneath mid-ocean ridges, mantle upwelling and decompression melting are fundamental processes contributing to the formation of oceanic crust. Previous geodynamic models have suggested that mantle upwelling driven by separating plates can be intensified by thermochemical buoyancy and the thickening of aging lithosphere, resulting in thicker crust. However, the relative contributions of these factors
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Low-Frequency Earthquakes Downdip of Deep Slow Slip Beneath the North Island of New Zealand J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-10 F. Aden-Antoniów, W. B. Frank, C. J. Chamberlain, J. Townend, L. M. Wallace, S. Bannister
We report the first catalog of low-frequency earthquakes in the Hikurangi subduction zone, located beneath the Kaimanawa Range of the North Island at 50 km depth, downdip of regularly recurring (every 4–5 years) deep M7 slow slip events. To systematically detect low-frequency earthquakes within the regional continuous seismic data, we utilized a matched-filter approach with template waveforms derived
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Onset of Plate Motion in the Presence of Chemical Heterogeneities in the Mantle and the Effect of Mantle Temperature J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-10 Claudia Stein, Ulrich Hansen
Chemical heterogeneities of various origins have been observed in the Earth's mantle. Their assumed higher density acts on the style of mantle convection and therefore, as tectonic plates form the highly viscous upper boundary layer of mantle convection, the onset of surface motion is also affected by chemical heterogeneities. We perform 2D basally heated thermochemical mantle convection models which
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Next Generation Seismic Source Detection by Computer Vision: Untangling the Complexity of the 2016 Kaikōura Earthquake Sequence J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-11 Fengzhou Tan, Honn Kao, Kwang Moo Yi, Edwin Nissen, Chet Goerzen, Jesse Hutchinson, Dawei Gao, Amir M. Farahbod
Seismic source locations are fundamental to many fields of Earth and planetary sciences, such as seismology, volcanology and tectonics. However, seismic source detection and location are challenging when events cluster closely in space and time with signals tangling together at observing stations, such as they often do in major aftershock sequences. Though emerging algorithms and artificial intelligence
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Numerical Simulation of Electromagnetic Responses to an Earthquake Source Due To the Piezoelectric Effect of ‘∞m’ Symmetry J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-10 Jie Zhao, Yongxin Gao, Qianli Cheng, Guanqun Zhou, Chieh-Hung Chen, Xuemin Zhang, Yang-yi Sun
It is reported that earthquakes are accompanied by electromagnetic (EM) anomalies. These anomalies are thought to be caused by earthquakes but their generation mechanism is still unclear. The piezoelectric effect has been proposed as a possible mechanism, particularly in quartz-rich rocks. However, the EM responses to earthquakes due to such an effect have not been well understood. In this article
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The Redox State of the Asthenospheric Mantle and the Onset of Melting Beneath Mid-Ocean Ridges J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-10 Fangyi Zhang, Shaocong Lai, Vincenzo Stagno, Lihui Chen, Chao Zhang, Renzhi Zhu, Yu Zhu, Xiaojun Wang, Jiangfeng Qin, Jixin Wang
The redox state of the convective asthenospheric mantle governs the speciation of volatile elements such as carbon and, therefore, influences the depth at which (redox) melting can occur, with implications for seismic signals. Geophysical observations suggest the potential presence of carbonatite melts at a depth of 200–250 km. However, thermodynamic models indicate that the onset of (redox) melting
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The Response of Taupō Volcano to the M7.8 Kaikōura Earthquake J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-09 J. Schuler, S. Hreinsdóttir, F. Illsley-Kemp, C. Holden, J. Townend, P. Villamor
Several studies suggest that large earthquakes (M > 7.0) can act as external triggers of volcanic unrest, and even eruption. This triggering is attributed to either ground shaking (dynamic stresses) or to permanent ground deformation (associated with static stress changes). However, large earthquakes are rare and testing triggering hypotheses has proven difficult. We use geodetic data to show that
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Possible Mechanisms for Tsunami-Like Surge Deposits Due To the Chicxulub Impact at the K-Pg Boundary at the Tanis Site, North Dakota J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-09 Randall J. LeVeque, Robert A. DePalma, Carrie Garrison-Laney, Satish Maurya, Jan Smit, Mark A. Richards
At Tanis, a unique bi-directional sediment package occurs precisely at the Cretaceous-Paleogene (K-Pg) boundary, recording the first hours of the Paleogene in uncommonly fine temporal detail. The impact ejecta-bearing sediment package was rapidly emplaced by two massive, ∼10-m-high, potentially impact-triggered surges, that inundated a steep, deeply incised paleo river valley from the direction of
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A Reciprocity-Based Efficient Method for Improved Source Parameter Estimation of Submarine Earthquakes With Hybrid 3-D Teleseismic Green's Functions J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-08 Chong Zang, Wenbo Wu, Sidao Ni, Min Xu
Accurate source parameters of global submarine earthquakes are essential for understanding earthquake mechanics and tectonic dynamics. Previous studies have demonstrated that teleseismic P coda waveform complexities due to near-source 3-D structures are highly sensitive to source parameters of marine earthquakes. Leveraging these sensitivities, we can improve the accuracy of source parameter inversion
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Waveform Fitting of Receiver Functions for Enhanced Retrieval of Crustal Structure in the Presence of Sediments J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-07 Stephen Akinremi, Mark van der Meijde, Christine Thomas, Juan Carlos Afonso, Elmer Ruigrok, Islam Fadel
The receiver function technique is widely used to image crustal structure using P-to-S converted phases at the Moho discontinuity. However, the presence of sedimentary layer generates additional P-to-S conversions and reverberations, which can overprint the Moho phases and pose problems in imaging crustal structure with standard receiver function techniques. We introduce a robust two-step method that
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2-D Geodynamic Modeling of the Central South Atlantic Wide Rifted Margins, Implications for Evaporite Deposition J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-07 T. Theunissen, R. S. Huismans, D. Rouby, C. Gout
The thick late syn- to early post-rift shallow water evaporites in the most distal part of wide rifted margins is paradoxical with the deep depression at crustal breakup time predicted by isostatically compensated lithospheric thinning. Elevation of the distal margin and water depth during deposition of the late syn-rift evaporites in the central South Atlantic are not well constrained and remain to
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Reassessment of Birch's Law on hcp-Fe From Ultrasonic Sound Velocity Measurement and Implications on the Velocity Profiles of Earth's Inner Core J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-02 Siheng Wang, Sibo Chen, Xintong Qi, Man Xu, Tony Yu, Yanbin Wang, Baosheng Li
We performed in situ X-ray diffraction and ultrasonic sound velocity measurements on hcp-Fe up to 15 GPa, 873 K in a multi-anvil apparatus. The elastic moduli and their pressure and temperature derivatives were determined by fitting the velocity and density data to the third-order finite strain equations, yielding KS0 = 169.0(57) GPa, KS0′ = 5.4(6), (∂KS/∂T)P = −0.031(3) GPa/K, G0 = 104.5(27) GPa,
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Viscosity Measurements at High Pressures: A Critical Appraisal of Corrections to Stokes' Law J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-05-02 Aaron Wolfgang Ashley, Mainak Mookherjee, Man Xu, Tony Yu, Geeth Manthilake, Yanbin Wang
Fluids and melts in planetary interiors significantly influence geodynamic processes from volcanism to global-scale differentiation. The roles of these geofluids depend on their viscosities (η). Constraining geofluid η at relevant pressures and temperatures relies on laboratory-based measurements and is most widely done using Stokes' Law viscometry with falling spheres. Yet small sample chambers required
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A Common Diffusional Mechanism for Creep and Grain Growth in Polymineralic Rocks: Application to Lower Mantle Viscosity Estimates J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-30 A. Okamoto, T. Hiraga
In a previous study (Okamoto & Hiraga, 2022, https://doi.org/10.1029/2022jb024638), we concluded that diffusion creep and grain growth in polymineralic rocks proceed by a common diffusional mechanism. Here, we built on that finding and estimated lower mantle grain size and viscosity during a single mantle convection cycle dominated by diffusion creep. We approximated the lower mantle as a two-phase
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An Ellipsoidal Plate Motion Model of the Indo-Australian Tectonic Plate J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-29 J. C. McCubbine, A. R. Riddell, N. Brown
We present a class of “ellipsoidal rotation matrices” which can be used to characterize tectonic plate motion; where geocentric Cartesian coordinates travel along paths tangential to the ellipsoid. We contrast them with conventional Euler pole plate motion models which are more closely aligned with spherical coordinate systems and inherently induce a change in geodetic ellipsoidal height. We demonstrate
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Influence of GIA Uncertainty on Climate Model Evaluation With GRACE/GRACE-FO Satellite Gravimetry Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-30 Annette Eicker, Lennart Schawohl, Klara Middendorf, Meike Bagge, Laura Jensen, Henryk Dobslaw
Global coupled climate models are in continuous need for evaluation against independent observations to reveal systematic model deficits and uncertainties. Changes in terrestrial water storage (TWS) as measured by satellite gravimetry missions GRACE and GRACE-FO provide valuable information on wetting and drying trends over the continents. Challenges arising from a comparison of observed and modelled
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Stress Variations in Southern Tonga Slab Derived From Deep-Focus Earthquakes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-29 Pavla Hrubcová, Ghazaal Rastjoo, Václav Vavryčuk
Tonga is a convergent plate boundary between the Pacific and Australian plates and is the fastest and the most seismically active deep subduction system in the world. We focused on southern Tonga (south of latitude 22°S) and the mantle transition zone (depths of 410–670 km), where seismic activity forms two subparallel bands of events in the east and west. We performed stress analysis by inverting
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Atomic-Scale Study of Intercrystalline (Mg,Fe)O in Planetary Mantles: Mechanics and Thermodynamics of Grain Boundaries Under Pressure J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-26 Sebastian Ritterbex, Taku Tsuchiya, Martyn Drury, Oliver Plümper
Polycrystalline (Mg,Fe)O ferropericlase is the second most abundant mantle constituent of the Earth and possibly of super-Earth exoplanets. Its mechanical behavior is expected to accommodate substantial plastic deformation in Earth's lower mantle. While bulk properties of ferropericlase have been extensively studied, the thermodynamics of grain boundaries and their role on mechanical response remain
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Seismic Anisotropy and Deep Crustal Deformation Across Alaska J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-27 Chuanming Liu, Michael H. Ritzwoller
Based on a new seismic surface wave data set, we present a model of Alaskan crustal seismic anisotropy that provides new insight into Alaska's geographically diverse deformation history. We use both Rayleigh and Love wave isotropic phase speed and Rayleigh wave azimuthal anisotropy to estimate crustal anisotropy. Unlike traditional seismic tomography, which focuses on apparent seismic anisotropy in
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Long Period Rayleigh Wave Focal Spot Imaging Applied to USArray Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-25 C. Tsarsitalidou, G. Hillers, B. Giammarinaro, P. Boué, L. Stehly, M. Campillo
We demonstrate the effectiveness of seismic dense array surface wave focal spot imaging using USArray data from the western-central United States. We study dispersion in the 60–310 s period range and assess the image quality of fundamental mode Rayleigh wave phase velocity maps. We apply isotropic spatial autocorrelation models to the time domain zero lag noise correlation wavefield data at distances
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Issue Information J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-26
No abstract is available for this article.
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Using Vehicle-Induced DAS Signals for Near-Surface Characterization With High Spatiotemporal Resolution J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Siyuan Yuan, Jingxiao Liu, Hae Young Noh, Robert Clapp, Biondo Biondi
Vehicle-induced seismic waves, generated as vehicles traverse the ground surface, carry valuable information for imaging the underlying near-surface structure. These waves propagate differently in the subsurface depending on soil properties at various spatial locations. By leveraging wave propagation characteristics, such as surface-wave velocity and attenuation, this study presents a novel method
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Thermoelastic Properties of B2-Type FeSi Under Deep Earth Conditions: Implications for the Compositions of the Ultralow-Velocity Zones and the Inner Core J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-20 Tao Liu, Zhicheng Jing
The CsCl-type (B2) phase of FeSi (B2-FeSi) has been proposed as a candidate phase in the ultralow-velocity zones (ULVZs) at the base of the lower mantle and in the Earth's inner core. However, the elastic properties of B2-FeSi under relevant conditions remain unclear. Here we determine the density, elastic constants, and velocities of B2-FeSi at high pressures (90–390 GPa) and temperatures (3,000–6
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Middle Neoproterozoic (Tonian) Polar Wander of South China: Paleomagnetism and ID-TIMS U-Pb Geochronology of the Laoshanya Formation J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Justin A. D. Tonti-Filippini, Boris Robert, Élodie Muller, André N. Paul, Fabian Dellefant, Michael Wack, Jun Meng, Xixi Zhao, Urs Schaltegger, Stuart A. Gilder
Paleomagnetic records of middle Neoproterozoic (820 to 780 Ma) rocks display high amplitude directional variations that lead to large discrepancies in paleogeographic reconstructions. Hypotheses to explain these data include rapid true polar wander (TPW), a geomagnetic field geometry that deviates from a predominantly axial dipole field, a hyper-reversing field (>10 reversals/Ma), and/or undiagnosed
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Water-Wave-Induced OBS Noise: Theories, Observations, and Potential Applications J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-25 Chun Zhang, Chao An
The horizontal records of ocean-bottom seismometers (OBS) are usually highly noisy, generally due to ocean-bottom currents tilting the instrument, which greatly limits their practical usage in ocean-bottom seismology. In shallow water, water waves with energy concentration around 0.07 Hz induce additional noise on OBSs. Such noise is not well understood. In this article, we propose a noise model to
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Deciphering Clues Regarding Magma Composition Encoded in Quartz-Hosted Embayments and Melt Inclusions Through Direct Numerical Simulations J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Zihan Wei, Anna C. Ruefer, Ayla S. Pamukcu, Jenny Suckale
Crystal-hosted melt embayments and melt inclusions partially record magmatic processes at depth, but it is not always obvious how to interpret this record. One impediment is our incomplete understanding of how embayments and melt inclusions form. In this study, we investigate the formation mechanism of embayments and melt inclusions during quartz growth to quantify the relationship between the compositions
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Continental Residual Topography Extracted From Global Analysis of Crustal Structure J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Simon N. Stephenson, Mark J. Hoggard, Megan C. Holdt, Nicky White
Continental topography is dominantly controlled by a combination of crustal thickness and density variations. Nevertheless, it is clear that some additional topographic component is supported by the buoyancy structure of the underlying lithospheric and convecting mantle. Isolating these secondary sources is not straightforward, but provides valuable information about mantle dynamics. Here, we estimate
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Thank You to Our 2023 Reviewers J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Alexandre Schubnel, Rachel Abercrombie, Yves Bernabé, Michael Bostock, Mark Dekkers, Anke Friedrich, Shin-Chan Han, Satoshi Ide, Isabelle Manighetti, Fenglin Niu, Douglas R. Schmitt, Jun Tsuchiya
The entire editorial board of the Journal of Geophysical Research-Solid Earth would like to sincerely thank all our colleagues who reviewed manuscripts for us in 2023. The hours they spent reading in order to provide insightful comments on manuscripts not only help improve the quality of these manuscripts but also ensure the scientific rigor of our reviewing process and eventually, of the research
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Paleoenvironmental Controls on the Abundances of Magnetofossils in the Southwestern Iberian Margin J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-24 Kuang He, Xiangyu Zhao, Zhaoxia Jiang, Sanzhong Li
Magnetofossils are nanosized magnetic fossil remnants of magnetotactic bacteria (MTB) that are widely distributed in marine and freshwater sediments. Past studies have revealed that changes in the morphology and abundance of magnetofossils are linked with diverse paleoenvironmental changes, such as glacial-interglacial variation, redox conditions associated with primary productivity and organic matter
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Advanced 3D TH and THM Modeling to Shed Light on Thermal Convection in Fault Zones With Varying Thicknesses J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-20 H. Duwiquet, A. Genter, L. Guillou-Frottier, F. V. Donzé, P. Ledru, F. Magri, T. Guillon, R. N. Horne, L. Arbaret, C. Souque
Fault zones exhibit 3D variable thickness, a feature that remains inadequately explored, particularly with regard to the impact on fluid flow. Upon analyzing an analytic solution, we examine 3D thermal-hydraulic (TH) dynamical models through a benchmark experiment, which incorporates a fault zone with thickness variations corresponding to realistic orders of magnitude. The findings emphasize an area
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Revisiting the Tianwen Yellow Pumice (TYP) Eruption of Changbaishan Volcano: Tephra Correlation, Eruption Timing and Its Climatostratigraphical Context J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Xuan-Yu Chen, Yi-Gang Xu, Pavel E. Tarasov, Christian Leipe, Ji-Hoon Kim, Shuang Yan, Myong-Ho Park, Jong-Hwa Chun, Cong Chen, Peng-Li He, Simon P. E. Blockley
Changbaishan volcano (China/North Korea) is one of the most active and hazardous volcanic centers in Northeast Asia. Despite decades of intensive research, the eruption history of this stratovolcano remains poorly constrained. One of the major puzzles is the timing of the eruption that produced the Tianwen Yellow Pumice (TYP) deposit at the caldera rim. Here we identify a new cryptotephra layer in
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Insights Into the Structure of the Mongol-Okhotsk Suture Zone, Adaatsag Ophiolite, and Tectonic Boundaries of the Central Asian Orogenic Belt (Mongolia) From Electrical Resistivity Imaging and Seismic Velocity Models J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-23 Matthew J. Comeau, Rafael Rigaud, Erdenechimeg Batmagnai, Shoovdor Tserendug, Alexey Kuvshinov, Michael Becken, Sodnomsambuu Demberel
The Mongol-Okhotsk suture and the Adaatsag ophiolite belt are associated with the closure of the Mongol-Okhotsk paleo-ocean and are located within the Central Asian Orogenic Belt (CAOB) and Mongolia. The suture zone is flanked by volcanic-plutonic belts that host significant metallogenic zones, containing deposits of copper and gold. The tectonic evolution of this region is not fully understood and
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Possible Eoarchean Records of the Geomagnetic Field Preserved in the Isua Supracrustal Belt, Southern West Greenland J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-24 Claire I. O. Nichols, Benjamin P. Weiss, Athena Eyster, Craig R. Martin, Adam C. Maloof, Nigel M. Kelly, Mike J. Zawaski, Stephen J. Mojzsis, E. Bruce Watson, Daniele J. Cherniak
Recovering ancient records of Earth's magnetic field is essential for determining the role of the magnetosphere in protecting early Earth from cosmic radiation and atmospheric escape. We present paleomagnetic field tests hinting that a record of Earth's 3.7-billion-year (Ga) old magnetic field may be preserved in the northeastern Isua Supracrustal Belt as a chemical remanent magnetization acquired
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Evaluating the Rheological Controls on Topography Development During Craton Stabilization: Objective Approaches to Comparing Geodynamic Models J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-18 Kristina Kublik, Claire A. Currie, D. Graham Pearson
Surface topography is an important yet largely neglected aspect of the early evolution of cratons. The lateral accretion of cratonic nuclei inevitably forms orogenic belts that subsequently provide a sediment source for large, resource-rich intracratonic basins, but to date, geodynamic models have focused exclusively on lithospheric root processes. Here we use two-dimensional thermal-mechanical models
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An Updated Fault Coupling Model Along Major Block-Bounding Faults on the Eastern and Northeastern Tibetan Plateau From a Stress-Constrained Inversion of GPS and InSAR Data J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-18 Dezheng Zhao, Chunyan Qu, Xinjian Shan, Wenyu Gong, Huihui Weng, Han Chen, Donglin Wu
Large block-bounding faults on the Tibetan plateau are significant geological structures that accommodate tectonic movements and accumulate stress, leading to large earthquakes. Quantifying the interseismic slip deficit rate helps to better assess the earthquake potential. We combine available InSAR (2015–2020) and interseismic GPS data to determine fault coupling along 14 major block-bounding faults
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Monitoring Velocity Change Over 20 Years at Parkfield J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-18 Kurama Okubo, Brent G. Delbridge, Marine A. Denolle
We monitored the time history of the velocity change (dv/v) from 2002 to 2022 to investigate temporal changes in the physical state near the Parkfield Region of the San Andreas Fault throughout the interseismic period. Following the coseismic decrease in dv/v caused by the 2003 San Simeon (SS) and the 2004 Parkfield earthquakes, the dv/v heals logarithmically and shows a net long-term increase in which
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Introduction to the Distributional Finite Difference Method for 3D Seismic Wave Propagation and Comparison With the Spectral Element Method J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-18 Chao Lyu, Yder Masson, Barbara Romanowicz, Liang Zhao
We have extended the distributional finite difference method (DFDM) to simulate the seismic-wave propagation in 3D regional earth models. DFDM shares similarities to the discontinuous finite element method on a global scale and to the finite difference method locally. Instead of using linear staggered finite-difference operators, we employ DFDM operators based on B-splines and a definition of derivatives
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Importance of Water-Clay Interactions for Fault Slip in Clay-Rich Rocks J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-18 Markus Rast, Claudio Madonna, Paul A. Selvadurai, Quinn C. Wenning, Jonas B. Ruh
Clay-rich rocks are integral to subduction zone dynamics and of practical importance, for example, as barriers in nuclear waste and CO2 repositories. While the effects of swelling strain on the self-sealing capabilities of these rocks are relatively well-established, the implications of polar fluids interacting with charged clay particles on the frictional behavior, and the role of swelling stress
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Laboratory Earthquake Ruptures Contained by Velocity Strengthening Fault Patches J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-17 Jun Young Song, Gregory C. McLaskey
Many natural faults are believed to consist of velocity weakening (VW) patches surrounded by velocity strengthening (VS) sections. Numerical studies routinely employ this framework to study earthquake sequences including repeating earthquakes. In this laboratory study, we made a VW asperity, of length L, from a bare Poly(methyl methacrylate) PMMA frictional interface and coated the surrounding interface
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Role of Crack Interaction on Shear Localization in Porous Granular Rocks Deformed in the Brittle and Ductile Fields J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-17 Taka Kanaya, Greg Hirth
Crack interactions leading to shear localization were quantified using microstructural analysis for brittle faults and high-temperature ductile faults formed during experiments on quartz sandstone. In both faulting regimes, the nucleation of macroscopic faults results from the interactions of microfractures at two length scales in ensemble. Brittle faults nucleate when the longest mesoscale shear fractures
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Ultra-Low Velocity Zones Beneath the Southern Hemisphere Imaged With Double-Array Stacking of PcP Waveforms J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-17 Kayode J. Agboola, Samantha E. Hansen, Edward J. Garnero, Sebastian Rost, Mingming Li, Sang-Heon Shim
Ultra-low velocity zones (ULVZs) are anomalous structures, generally associated with decreased seismic velocity and sometimes an increase in density, that have been detected in some locations atop the Earth's core-mantle boundary (CMB). A wide range of ULVZ characteristics have been reported by previous studies, leading to many questions regarding their origins. The lowermost mantle beneath Antarctica
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Thermal and Physical Properties of Barrovian Metamorphic Sequence Rocks in the Ailao Shan-Red River Shear Zone, and Implications for Crustal Channel Flow J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-14 Lei Ji, Fulai Liu, Richard Palin, Fang Wang, Zaibo Sun
The collisional history between Greater India and the Eurasian plate has been well constrained by the study of exhumed Barrovian metamorphic sequence (BMS) rocks in the Himalayan Range. However, in the southeastern Tibetan Plateau, the collisional records have been obscured by intense, regional-scale strike-slip overprinting and recrystallization. Here, in BMS rocks from the Ailao Shan–Red River shear
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Disagreements in Geodetically Inferred Strain Rates in the Western US With Stress Orientations and Geologic Moment Rates J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-15 Kaj M. Johnson
I employ an elasticity-based method to invert a geodetically derived surface velocity field in the western US using for present-day surface strain rate fields with uncertainties. The method uses distributed body forces in a thin elastic sheet and allows for discontinuities in velocity across creeping faults using the solution for dislocations in a thin elastic plate. I compare the strain rate fields
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Salient Changes of Earth's Magnetic Field Toward the End of Cretaceous Normal Superchron (CNS) J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-15 Xinyu Liu, Yong-Xiang Li, Carl Richter
Changes in Earth's magnetic field during the Cretaceous Normal Superchron (CNS) spanning ∼121 Ma to ∼84 Ma hold important clues about the geodynamo evolution. Canonical models predict a persistently strong geomagnetic field with low variability during CNS, which, however, has not been observed in the available absolute paleointensity data and seafloor marine magnetic anomaly (MMA) records. The lack
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The Architecture of a Root Zone of a Large Magmatic Conduit System From High Resolution Magnetic, Gravity and Petrophysical Data: The Reinfjord Ultramafic Complex J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-13 Z. Pastore, N. S. Church, C. Fichler, A. Michels, G. W. ter Maat, R. B. Larsen, S. A. McEnroe
The Seiland Igneous Province (SIP) is a large province of mafic and ultramafic (UM) complexes interpreted to be relics of a giant plumbing system feeding the Ediacaran Central Iapetus Magmatic Province. The Reinfjord Ultramafic Complex (RUC) is one of the four major ultramafic complexes of the SIP. The RUC has a younger dunite core surrounded by wehrlite and lherzolite embedded in country rocks consisting
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Path and Slip Dependent Behavior of Shallow Subduction Shear Zones During Fluid Overpressure J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-13 Benjamin D. Belzer, Melodie E. French
Elevated pore fluid pressure is proposed to contribute to slow earthquakes along shallow subduction plate boundaries. However, the processes that create high fluid pressure, disequilibrium compaction and dehydration reactions, lead to different effective stress paths in fault rocks. These paths are predicted by granular mechanics frameworks to lead to different strengths and deformation modes, yet
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Non-Double-Couple Components of Seismic Source: Method and Application to the 2014–2015 Bárðarbunga Volcanic Event Sequence, Iceland J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-11 Yanyan Xu, Lianxing Wen
Genuine non-double-couple (non-DC) components of a seismic source, defined here as the non-DC components that are not due to summation of pure double-couple (DC) components, provide important insight into special physical processes in non-earthquake sources such as explosion, volcano eruption and collapse etc. Yet they remain challenging to be resolved. To address the issue and explore the physical
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Rock Anisotropy Promotes Hydraulic Fracture Containment at Depth J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-11 Guanyi Lu, Seyyedmaalek Momeni, Carlo Peruzzo, Fatima-Ezzahra Moukhtari, Brice Lecampion
We report laboratory experiments and numerical simulations demonstrating that the anisotropic characteristics of rocks play a major role in the elongation of hydraulic fractures (HFs) propagating in a plane perpendicular to the rocks' inherent layering (the bedding planes in sedimentary rocks and foliation planes in metamorphic rocks). Transverse anisotropy leads to larger HF extension in the para
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CO2 Flushing Triggers Paroxysmal Eruptions at Open Conduit Basaltic Volcanoes J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Luca Caricchi, Chiara P. Montagna, Alessandro Aiuppa, Joao Lages, Giancarlo Tamburello, Paolo Papale
Open conduit volcanoes erupt with the highest frequency on Earth. Their activity is characterized by an outgassing flux that largely exceeds the gas that could be released by the erupted magma; and by frequent small explosions intercalated by larger events that pose a significant risk to locals, tourists, and scientists. Thus, identifying the signs of an impending larger explosion is of utmost importance
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High-Resolution Paleomagnetic Secular Variation Since ∼13 ka From a Loess Section in Northwest China and a Regional Geomagnetic Directional Model for East Asia J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Yunchang Fan, Shuhui Cai, Francisco Javier Pavón-Carrasco, Jianguo Xiong, Chenglong Deng, Yongxin Pan
Paleomagnetic secular variation (PSV) records provide important information for the dynamic processes of the Earth's geomagnetic field, and also can be used for regional stratigraphic correlation. We conducted a paleomagnetic study on a high sedimentation rate Holocene loess section (the Minle section) with precise 14C age constraints in Northwest China. Rock magnetic results indicate that single domain
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Dynamical Modeling of Fault Slip Rates at the New Zealand Plate Boundary Indicates Fault Weakness J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 H. Hirschberg, R. Sutherland
We construct a thin-sheet dynamical model of the New Zealand plate boundary that includes faults. Our model fits fault slip rates, style of distributed deformation, and is constrained by relative plate boundary motion. We assume a pseudo-plastic rheology and achieve a best fit to slip rate observations with a deviatoric stress magnitude of 20 MPa. Modeled local forces are significant at Puysegur and
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Temporal Seismic Velocity Changes Associated With the Mw 6.1, May 2008 Ölfus Doublet, South Iceland: A Joint Interpretation From dv/v and GPS J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-08 Yeşim Çubuk-Sabuncu, Kristín Jónsdóttir, Thóra Árnadóttir, Aurélien Mordret, Corentin Caudron, Thomas Lecocq, Raphael De Plaen
In South Iceland, populated and agricultural areas are at risk of earthquakes due to their location within the South Iceland Seismic Zone (SISZ). In 2008, two moderate-sized earthquakes (M5.8 and M5.9) occurred in Ölfus, the western end of this highly active transform zone. We analyze temporal seismic velocity variations (dv/v) related to the Ölfus earthquake doublet, using cross-correlations of ambient
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Source Parameters of Laboratory Acoustic Emission Events Estimated From the Coda of Waveforms J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-06 Tatiana I. Kartseva, Nikolai M. Shapiro, Andrey V. Patonin, Natalia M. Shikhova, Vladimir B. Smirnov, Alexander V. Ponomarev
We develop a method to estimate relative seismic moments M0 and corner frequencies fc of acoustic emission events recorded in laboratory experiments from amplitude spectra of signal's coda composed of reverberated and scattered waves. This approach has several advantages with respect to estimations from direct waves that are often clipped and also are difficult to separate in experiments performed
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Banding in the Margins of Basaltic Dykes Indicates Pulsatory Propagation During Emplacement J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 C. Allgood, E. W. Llewellin, M. C. S. Humphreys, S. A. Mathias, R. J. Brown, C. Vye-Brown
Basaltic fissure eruptions, which are the most common type of eruption on Earth, are fed by dykes which mediate magma transport through the crust. Dyke propagation processes are important because they determine the geometry of the transport pathway and the nature of any geophysical signals associated with magma ascent. Here, we investigate small-scale (mm–cm wide) banding features at the margins of
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Gas Seepage and Pockmark Formation From Subsurface Reservoirs: Insights From Table-Top Experiments J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 I. Vaknin, E. Aharonov, R. Holtzman, O. Katz
Pockmarks are morphological depressions commonly observed in ocean and lake floors. Pockmarks form by fluid (typically gas) seepage thorough a sealing sedimentary layer, deforming and breaching the layer. The seepage-induced sediment deformation mechanisms, and their links to the resulting pockmarks morphology, are not well understood. To bridge this gap, we conduct laboratory experiments in which
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Detailed 3D Structures of the Western Edge of the Pacific Large Low Velocity Province J. Geophys. Res. Solid Earth (IF 3.9) Pub Date : 2024-04-04 Jiewen Li, Baolong Zhang, Daoyuan Sun, Dongdong Tian, Jiayuan Yao
Large Low Velocity Provinces (LLVPs) are situated oppositely in the lowermost mantle beneath the Pacific Ocean and Africa. Deciphering the detailed seismic structures at the edge of LLVPs can provide key information on the composition and dynamics in the deep Earth. Here, we provide a detailed seismic image at the western edge of the Pacific LLVP by dense recordings. Differential travel time residuals