Journal of Geophysical Research: Solid Earth最新文献

{"title":"Magnetic and Paleomagnetic Characterization of the Ivrea-Verbano Lower Crust Body (NW Italy): Assessing the Magnetization of Variscan-Age Lower Crust","authors":"Gaia Siravo,&nbsp;Fabio Speranza,&nbsp;Liliana Minelli,&nbsp;Michele Zucali,&nbsp;Eugenio Fazio,&nbsp;Chiara Caricchi,&nbsp;Lilla Spagnuolo","doi":"10.1029/2024JB031017","DOIUrl":"10.1029/2024JB031017","url":null,"abstract":"<p>The source of high-intensity magnetic anomalies from (mostly Precambrian) lower crust of continent interiors has long been debated, as it requires speculative rocks yielding 2–6 A/m magnetization. We report on the magnetic and paleomagnetic investigation of the Ivrea-Verbano Zone (IVZ), Western Alps, where metamorphic and intrusive lower crust rocks of Late Variscan-Permian ages are exposed. We sampled 39 oriented sites along the Cannobina, Ossola, Strona, and Sesia valleys/sections. Low (0.27–2.1·10⁻³ SI) magnetic susceptibility (<i>k</i>) values were measured in metapelite-metabasite metamorphic rocks from the Ossola and Strona valleys. There only two metabasite (one amphibolite and one granulite) out of 25 metamorphic sites containing pseudo-single domain (PSD) magnetite yield 0.48–1.1·10⁻¹ SI <i>k</i> values that remain constant until 550°C heating. <i>K</i> of gabbros-granodiorites from Sesia valley mimic low values from metamorphic rocks, whereas at Cannobina valley one gabbro and one mafic granulite display values comparable to the two strongly magnetic sites from Ossola/Strona valleys. Peridotite lenses at Balmuccia and Finero similarly yielded low (0.24–5.5·10⁻³ SI) <i>k</i> values, consistently with their low (&lt;20%) serpentinization. Remanence contribution is negligible, as (a) <i>Q</i> &lt; 1 values imply remanent magnetization subordinate to induced magnetization, (b) paleomagnetic directions from most magnetic sites are scattered, and (c) remanence is unstable at lower crust temperatures. We conclude that IVZ lower crust rocks could not yield magnetic anomalies generated by Precambrian lower crust from continent interiors, and similar conclusions might stand for other Variscan-age lower crust sections. Scattered high-intensity metabasites could be candidates, if their PSD magnetite-rich mineralogy dominated Precambrian lower crust.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB031017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrical Conductivity of H2O-Rich Silicate Melt: Implications for Subduction Zone Magnetotelluric Anomalies","authors":"Jiale Ding,&nbsp;Xuan Guo,&nbsp;Li Zhang,&nbsp;Yunguo Li,&nbsp;Zhu Mao,&nbsp;Huaiwei Ni","doi":"10.1029/2024JB030224","DOIUrl":"10.1029/2024JB030224","url":null,"abstract":"<p>Magnetotelluric surveys reveal high conductivity anomalies in the deep Earth, which can be attributed to the presence of silicate melt, aqueous fluid, or supercritical fluid with intermediate water content. Electrical conductivity data of all of these liquids are needed to interpret magnetotelluric results and place constraints on the composition and volume fraction of the liquid phase. Electrical conductivity experiments to date are limited to silicate melt with H₂O &lt; 12 wt% or aqueous fluid with H₂O &gt; 92 wt%, leaving a vast gap with regard to H₂O content. This study reports the electrical conductivity of two K₂O-Al₂O₃-SiO₂ melts with H₂O content up to 35 wt% at 1.5 GPa and 900–1500°C. We find that the strong increase of electrical conductivity with H₂O content becomes more gradual after H₂O reaches 10 wt%. However, electrical conductivity at 1100°C can approach as high as 40 S/m at 35 wt% H₂O, in contrast with electrical conductivity of &lt;10 S/m for most silicate melts with several wt% H₂O. The variation of electrical conductivity with H₂O correlates with the variation of viscosity and diffusivity, which is rooted in the modification of melt structure and dynamics by H₂O. Application of the electrical conductivity data to interpretation of the magnetotelluric results in the Cascadia subduction zone reveals that the presence of 3 vol% of the extremely water-rich melt could account for the 0.5 S/m electrical anomaly detected at subarc depth on top of the subducted slab.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correcting Non-Tidal Atmospheric and Oceanic Loading Displacements at the Observation, Normal Equation, and Parameter Levels in GNSS Data Analysis","authors":"Jungang Wang,&nbsp;Kyriakos Balidakis,&nbsp;Henryk Dobslaw,&nbsp;Benjamin Männel,&nbsp;Maorong Ge,&nbsp;Robert Heinkelmann,&nbsp;Harald Schuh","doi":"10.1029/2024JB030299","DOIUrl":"10.1029/2024JB030299","url":null,"abstract":"<p>Non-tidal loading (NTL) introduces surface deformation on the Earth and increases the variability in coordinates measured by space geodetic techniques. Correcting NTL displacements in Global Navigation Satellite Systems (GNSS) analysis has been discussed extensively, commonly at the parameter level. We investigate the three levels of correcting non-tidal atmospheric and oceanic loading (NTAOL) displacements systematically in long-term analysis of GNSS global network solution, including the observation, normal equation, and parameter levels. The difference between the observation and normal equation levels lies in addressing high-frequency (sub-daily) displacements, and that between the normal equation and parameter levels concerns datum realization. Correcting NTAOL at the observation (or normal equation) level improves the station coordinate repeatability by 3%–4% horizontally and 13% vertically, slightly greater than that at the parameter level by 0.5%. Discrepancies in station coordinates between the observation (or normal equation) and the parameter level are minor but systematic, and the horizontal discrepancies can be largely reduced by Helmert transformation. These transformation parameters correspond to the datum parameters, including polar motion offsets and geocenter coordinates. High-frequency loading displacements mainly impact site-wise tropospheric parameters and especially receiver clocks, albeit with small magnitudes at the sub-mm level. Satellite orbits in the along and cross components are affected by both datum differences (between normal equation and parameter levels) and high-frequency displacements (between observation and normal equation levels), while radial component and satellite clocks are solely affected by the latter.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030299","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Establishing a Statistical Framework for Assessing Paleomagnetic Data Quality: A Significance Test Based on Maximum Angular Deviation","authors":"D. Heslop,&nbsp;A. P. Roberts","doi":"10.1029/2025JB031417","DOIUrl":"https://doi.org/10.1029/2025JB031417","url":null,"abstract":"<p>Paleomagnetic data underpin our understanding of Earth's ancient magnetic field and are essential to paleogeographic reconstructions. At the specimen level, paleomagnetic analysis relies upon stepwise demagnetization to enable isolation and quantification of magnetic remanence components in geological materials. This quantification is performed typically using principal component analysis (PCA) to fit a line to stepwise demagnetization data. The quality of such PCA fits is assessed via the so-called maximum angular deviation (MAD), which is used in a heuristic fashion to represent directional uncertainty and as a selection criterion for identifying poorly or well behaved specimens. We present here a significance test that employs MAD as a statistic to compare demagnetization data against a null hypothesis of random behavior. This places MAD within a formal statistical framework that can be used to test the quality of demagnetization data before undertaking more detailed analysis. Tables of numerically estimated significance levels are provided to enable ready application of the proposed test and recommendations are made concerning the number of demagnetization data needed for statistical inference.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2025JB031417","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144232441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterizing Seismic Swarm Activity in the Aftershock Zone of the 2016 Amatrice-Norcia Seismic Sequence","authors":"Louise Xiang,&nbsp;David Marsan","doi":"10.1029/2024JB029651","DOIUrl":"10.1029/2024JB029651","url":null,"abstract":"<p>The 2016 Central Italy seismic sequence unfolded in an area dominated by normal faulting along the Apennines. Our study models this complex sequence to explore the role of fluids and aseismic slip in triggering small seismic swarms. Leveraging a high-resolution earthquake catalog, we apply a three-dimensional density-based clustering approach to group earthquakes into dense clusters. We further define a four-dimensional seismicity model based on the Epidemic-Type Aftershock Sequence (ETAS) model, introducing an earthquake detection probability to accommodate rapid fluctuations in earthquake detection. By computing the ratio between observed and ETAS-modeled rates of earthquakes in high-density clusters, we identify 40 seismic swarms. These swarms occurred relatively uniform throughout the sequence, with significant time delays of weeks to months following the mainshocks. We investigated earthquake migration patterns during these swarms and found that 29 of them exhibited significant migration, particularly in the eastern parts of Visso and Norcia, as well as the southern part of the seismic sequence. The computation of migration velocity for each swarm yielded a mean migration rate of 3.7 m/hr, indicating a connection to fluid migration. The pressure changes exerted by the three largest shocks of the sequence are found to be mostly negative at the swarm locations, suggesting that the time delays between the mainshocks and the swarms are controlled by fluid migration from high- to low-pressure zones co-seismically. We propose that the poroelastic rebound, involving stress redistribution due to fluid movement, plays a crucial role in triggering seismic swarms in the geological context of Central Italy.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB029651","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144228711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Declining Gas Accumulation Under Hekla Volcano, Iceland, From 210Pb-226Ra Disequilibrium","authors":"G. Hervé,&nbsp;O. Sigmarsson,&nbsp;G. Larsen","doi":"10.1029/2024JB030840","DOIUrl":"https://doi.org/10.1029/2024JB030840","url":null,"abstract":"<p>Magmatic volatiles exceeding the solubility limits will form a gas phase that accumulates at the top of a magma chamber. If that magma chamber is hermetic, the exsolved gas can lead to overpressure causing an eruption. Such gas accumulation is hard to detect but the decay of ²²⁶Ra, in the ²³⁸U decay chain, produces ²²²Rn that will accumulate together with the major gas species, and rapidly decay to ²¹⁰Pb. Such radon accumulation and decay thus will lead to an excess of ²¹⁰Pb over ²²⁶Ra in the magma accumulating the gas phase. Eruptions at Hekla volcano, Iceland, start explosively producing tephra before an effusive lava forming phase. The tephra of the five latest eruptions of Hekla (1947–2000) has either an excess of ²¹⁰Pb over ²²⁶Ra, a consequence of the radon accumulation, or are in radioactive equilibrium as all the lava. Tephra is taken to represent the mass of magma accumulating gas and since 1947 the tephra volume has declined regularly. A simple model shows that the mass of the degassing deep magma has remained twice that of the gas-accumulating magma. Consequently, the diminishing mass of degassing basalt at depth is likely to result in decreasing gas flux into the shallower basaltic andesite magma chamber beneath Hekla. The negligible mass of tephra from the last eruption in the year 2000 therefore suggests that renewal of the basalt source seems to be needed for the next eruption at Hekla volcano.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144214149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fiber-Seismometer Hybrid Sensing Interferometry: A New Approach to Seismic Imaging and Monitoring","authors":"Jianbo Guan,&nbsp;Feng Cheng,&nbsp;Jianghai Xia,&nbsp;Haoyuan Sun","doi":"10.1029/2024JB031035","DOIUrl":"10.1029/2024JB031035","url":null,"abstract":"<p>Extreme climate events and geological disasters have intensified the urgency for advancing seismic imaging and monitoring. Despite developments in seismic instrumentation, particularly with seismometers and Distributed Acoustic Sensing (DAS), fine-scale observations remain challenging due to their inherent limitations and deployment configurations. This study introduces a novel hybrid sensing interferometry method that enhances multi-component signal extraction, especially poor horizontal components, through a two-step cross-correlation of DAS and seismometers. A field application near the Qiantang River in Hangzhou illustrates how our proposed framework retrieves high-quality multi-component empirical Green's functions and advances ultra-short duration ambient noise seismic imaging techniques, including surface wave dispersion measurements and horizontal-to-vertical spectral ratio assessments. Our approach also facilitates monitoring of near-surface seismic velocity changes, <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mrow>\u0000 <mi>d</mi>\u0000 <mi>v</mi>\u0000 <mo>/</mo>\u0000 <mi>v</mi>\u0000 </mrow>\u0000 </mrow>\u0000 <annotation> $dv/v$</annotation>\u0000 </semantics></math>, with an unprecedented 10-min resolution, shedding light on shallow dynamic hydraulic responses. This innovative hybrid sensing framework offers new perspectives and methodologies for transforming future research in seismological observation, imaging, and monitoring.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fault Gouge Failure Induced by Fluid Injection: Hysteresis, Delay and Shear-Strengthening","authors":"Pritom Sarma,&nbsp;Einat Aharonov,&nbsp;Renaud Toussaint,&nbsp;Stanislav Parez","doi":"10.1029/2024JB030768","DOIUrl":"https://doi.org/10.1029/2024JB030768","url":null,"abstract":"<p>Natural faults often contain a fluid-saturated, granular fault-gouge layer, whose failure and sliding processes play a central role in earthquake dynamics. Using a two-dimensional discrete element model coupled with fluid dynamics, we simulate a fluid-saturated granular layer, where fluid pressure is incrementally raised. At a critical fluid pressure level, the layer fails and begins to accelerate. When we gradually reduce fluid pressure, a distinct behavior emerges: slip-rate decreases linearly until the layer halts at a fluid pressure level below that required to initiate failure. During this pressure cycle the system exhibits (a) velocity-strengthening friction and (b) frictional hysteresis. These behaviors, well established in dry granular media, are shown to extend here to shear of dense fluid-saturated granular layers. Additionally, we observe a delay between fluid pressure increase and failure, associated with pre-failure dilative strain and “dilational-hardening.” During this delay period, small, arrested slip events dilate the layer in preparation for full-scale failure. Our findings may explain (a) fault motion that continues even after fluid pressure returns to pre-injection levels, and (b) delayed failure in fluid-injection experiments, and (c) pre-failure arrested slip events observed prior to earthquakes.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030768","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolving Sediment Structure and Lithospheric Architecture Across the Indo-Burman Forearc Margin From the Joint Inversion of Surface- and Scattered-Wave Seismic Constraints","authors":"Christopher J. W. Carchedi,&nbsp;James B. Gaherty,&nbsp;Joseph S. Byrnes,&nbsp;Stéphane Rondenay,&nbsp;Michael S. Steckler,&nbsp;Rasheed Ajala,&nbsp;Patricia Persaud,&nbsp;Eric A. Sandvol,&nbsp;Md. Samiul Alim,&nbsp;Sanju Singha,&nbsp;Syed Humayun Akhter","doi":"10.1029/2024JB030050","DOIUrl":"10.1029/2024JB030050","url":null,"abstract":"<p>The Indo-Burman subduction zone represents a global endmember for extreme sediment accretion and is a region characterized by ambiguous tectonic structure. The recent collection of broadband seismic data across the Indo-Burman accretionary margin as part of the Bangladesh-India-Myanmar Array (BIMA) experiment provides an opportunity to investigate the subsurface velocity structure across the incoming plate of an endmember subduction system. We construct a three-dimensional model for seismic shear velocity using a joint inversion of surface- and scattered-wave constraints. Rayleigh-wave phase velocities measured from ambient-noise (12–25 s) and teleseismic earthquakes (20–80 s) constrain absolute shear velocities, while we constrain the locations of and relative contrasts across significant discontinuities in the subsurface using observations from scattered-wave imaging. From the resulting inversion, we observe two model classes that characterize the evolution of consolidation within the markedly slow uppermost sediments and metasediments along a predominantly southwest-to-northeast trend. We interpret variations in deeper seismic structure under two proposed scenarios: (a) a Moho of ∼21–26 km depth underlying a package of metasediments and a thinned basement component, with a slow mantle lithosphere (4.2 km/s) that may contain retained melt from the onset of India-Antarctica seafloor spreading; or (b) a Moho of ∼51–59 km depth underlying a package of metasediments, basement, and a thick slug of mafic material, which may correspond to significant Kerguelen-plume-related underplating. By combining constraints from highly resolved phase-velocity estimates and scattered-wave images, we successfully characterize the lateral transitions across the Indo-Burman forearc margin.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030050","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plate-Scale Strike-Slip Fault System in the Barbados Accretionary Wedge of the Lesser Antilles Subduction Zone","authors":"Gaëlle Bénâtre,&nbsp;Nathalie Feuillet,&nbsp;Hélène Carton,&nbsp;Eric Jacques,&nbsp;Thibaud Pichot,&nbsp;Frédérique Leclerc,&nbsp;Christine Deplus","doi":"10.1029/2024JB030059","DOIUrl":"10.1029/2024JB030059","url":null,"abstract":"<p>Fault systems of various geometries develop into accretionary wedges to accommodate slip partitioning of plate convergence in oblique settings. However, how they form, evolve and contribute to the segmentation of the megathrust is still poorly understood. The Barbados accretionary wedge, which results from the subduction of the American plates beneath the Caribbean Plate at 2 cm/yr in a southwesterly direction, is one of the largest on Earth. Here we present a comprehensive morphotectonic study of this wedge based on a new marine geophysical data set acquired during the recent CASEIS marine experiment combined with legacy data sets. From a joint analysis of high-resolution bathymetry and seismic reflection profiles, we characterize a regional-scale left-lateral strike-slip fault system in the wedge, which began to form in Pliocene times and is still active today. It may relay, via a diffuse complex deformation system, to the Bunce left-lateral strike-slip fault in the north and may join the conjugate Kitridge right-lateral fault to the south. Both Bunce and Kitridge faults are themselves linked via relay zones to the main strike-slip fault systems bounding the Caribbean plate. They likely developed along the toe of the backstop and may mark a segmentation of the Lesser Antilles megathrust. The main segment of this system is the newly identified ∼580-km-long Seraphine fault, which is long enough to rupture during magnitude class 8 earthquakes. The kinematics of the entire fault system is incompatible with present-day NE-SW compression inferred at the Caribbean/American plate boundary and raises questions about the current geodynamics of the region.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030059","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}