Journal of Geophysical Research: Solid Earth最新文献

{"title":"To Heal or Not to Heal?: 1. The Effect of Pore Fluid Pressure on the Frictional Healing Behavior of Lithologies in Oklahoma","authors":"Kristina K. Okamoto,&nbsp;Heather M. Savage,&nbsp;Nicholas M. Beeler,&nbsp;Brett M. Carpenter","doi":"10.1029/2024JB030573","DOIUrl":"10.1029/2024JB030573","url":null,"abstract":"<p>The competition between fault healing (i.e., re-strengthening) and fault loading determines the timing and magnitude of fault failure within the seismic cycle. Repeating earthquakes can give observational estimates of fault healing rates, however, it is difficult to link laboratory studies of frictional healing and observed healing rates from repeating earthquakes in part because of uncertainty in lithology at depth. Due to well-constrained and relatively simple geology, earthquakes in Oklahoma can be linked to the granitic basement rock and to the Arbuckle Group, which is primarily composed of dolomite at earthquake depths. Here, we conduct friction experiments to measure healing rates of the two earthquake-bearing lithologies at confining pressures representative of earthquake depths and pore pressures ranging from 0% to 80% of the confining pressure. We measure frictional healing by executing slide-hold-slide tests with hold times ranging from 3 s to 3000 s. The friction experiments on the Troy Granite indicate that pore fluid pressure does not greatly affect healing rate. On the other hand, the dolomite of the Arbuckle Group exhibits decreased healing with increased pore fluid pressure, with weakening at the highest pore pressure. We hypothesize that this is due to an increase in dissolution of dolomite at high pore pressures/low effective normal stress. These healing rates are used in the companion paper to understand the moment-recurrence time behavior of repeating earthquakes in Prague, Oklahoma. This work has implications for possible enhanced dissolution and weakening behavior of the Arbuckle Group during wastewater injection activities.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030573","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071970","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":"To Heal or Not to Heal?: 2. The Moment–Recurrence Time Behavior of Repeating Earthquakes in the 2011 Prague, Oklahoma Aftershock Sequence Is Consistent With Laboratory Healing Rates","authors":"Kristina K. Okamoto,&nbsp;Heather M. Savage,&nbsp;Elizabeth S. Cochran,&nbsp;Emily E. Brodsky,&nbsp;Rachel Abercrombie","doi":"10.1029/2024JB030548","DOIUrl":"10.1029/2024JB030548","url":null,"abstract":"<p>The timing and failure conditions of an earthquake are governed by the interplay between fault reloading and restrengthening. The moment-recurrence time behavior of repeating earthquakes can give observational estimates of fault healing rates; however, it is difficult to link these observed healing rates to laboratory studies of frictional healing in part because of uncertainty in lithology. Here, we study the 2011 Prague earthquake sequence, which includes repeating earthquakes in the Arbuckle group and the granitic basement, and compare them to laboratory experiments on samples of the Arbuckle and Troy granite (representative of the basement rock) (Okamoto et al., 2025, https://doi.org/10.1029/2024JB030573). We find three spatially distinct groups of repeating earthquakes with different moment-recurrence behavior: (a) constant moment-recurrence time in the Arbuckle group, (b) scattered moment-recurrence time at the intersection of the foreshock-mainshock fault in the granitic basement, and (c) moment-predictable behavior outside of the foreshock-mainshock fault intersection also in the granitic basement. Our observation of stagnant healing for repeating sequences in the Arbuckle group is consistent with laboratory observations of low healing rates for moderately high pore fluid pressures in Arbuckle samples. For the moment-predictable group, the source radius that is required in order to match healing rates is consistent with source radius estimations when taking into account reasonable attenuation of the <i>P-</i>pulse width. Overall, we observe diverse healing behaviors in the seismic families that are consistent with laboratory healing rates, providing seismic evidence that contact-scale frictional mechanisms are relevant to large-scale earthquake dynamics.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030548","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071969","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":"Geomechanics of Flooding-Induced Microseismicity—Implications for Post-Mining Environments","authors":"Thomas Niederhuber,&nbsp;Martina Rische,&nbsp;Birgit Müller,&nbsp;Thomas Röckel,&nbsp;Felix Allgaier,&nbsp;Kasper D. Fischer,&nbsp;Frank Schilling,&nbsp;Wolfgang Friederich","doi":"10.1029/2025JB031323","DOIUrl":"10.1029/2025JB031323","url":null,"abstract":"<p>Seismicity related to mining has gained considerable public attention in the last decades and is one of the reasons for mine closures in Germany. The seismicity in the Ruhr coal mining district of Germany has been monitored by different regional and (temporal) local networks and is classified as purely mining-induced without evidence for movement of major geological faults due to the contemporary tectonic stress field. During active mining, water was continuously pumped out of the mine to enable safe mining conditions. Mine closure was followed by a seismic gap. When pumping was reduced the mines were gradually flooded and microseismicity developed. This study investigates flooding-induced seismicity at the Heinrich Robert mine in the Eastern Ruhr coal district, where water levels rise from ∼1,150 m to ∼380 m depth as part of post-mining flooding operations. By applying event relocalization methods we detected concentrations of microseismicity at about 300 m below the lowest mine levels, and there especially in sections with pillars above. Classical diffusion models cannot be applied due to the non-linearities in the increase of pore pressure and water volume, different flow processes and the heterogeneity of the subsurface. We performed 3D numerical geomechanical modeling for different mine geometries, hydraulic behaviors and regional state of stress. Our results show that flooding-induced seismicity in mines is less influenced by the ambient stress state and the flooding water volume. Instead, the locations, the temporal evolution and the segments of potential fault reactivation during flooding are controlled by a combination of local stress concentrations in pillar zones below the lowest mining level and pore pressure rise. Both are governed by a complex mine geometry and the hydraulic connections therein. Our findings support that the magnitude of flooding-related earthquakes is controlled and limited by the size of critical stress concentrations and thus the dimensions of the mined panels.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JB031323","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077248","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":"Equation of State, Refractive Index and Sound Velocity of Tetragonal Ti-Bearing Calcium Perovskite","authors":"Ye Wu,&nbsp;Feiyu Deng,&nbsp;Bin Zhao,&nbsp;Youyue Zhang,&nbsp;Yuyang Shi,&nbsp;Tian Qin,&nbsp;Feng Xu,&nbsp;Haijun Huang,&nbsp;Sergey S. Lobanov,&nbsp;Takayuki Ishii","doi":"10.1029/2025JB031289","DOIUrl":"10.1029/2025JB031289","url":null,"abstract":"<p>Understanding of the observed seismic velocities requires knowledge of the sound velocities of constituent minerals in Earth's interior. As the third most abundant phase of the lower mantle, calcium silicate perovskite (davemaoite) has a significant influence on mineralogical models. Experimental measurements of sound velocities of davemaoite at lower mantle conditions are scarce due to its unquenchable nature. Here, we synthesized quenchable Ti-bearing calcium perovskite as a good analogue for unquenchable davemaoite and investigated its crystal structure, equation of state, refractive index, and sound velocity under high pressure. Tetragonal Ti-bearing calcium perovskite is stable without phase transition up to ∼48 GPa but exhibits enhancing octahedral rotation and distortion with increasing pressure. The refractive index of Ti-bearing calcium perovskite increases slightly with pressure ranging from ∼1.93 at 15 GPa to ∼2.04 at 73 GPa and was used to calculate longitudinal sound velocity by time-domain Brillouin scattering measurements. Applying density, isothermal bulk modulus and its pressure derivative obtained by the constructed equation of state, then transverse sound velocity of Ti-bearing calcium perovskite was derived. Sound velocities of Ti-bearing calcium perovskite are significantly lower than those of CaSiO₃, especially transverse sound velocity. Low sound velocities of calcium perovskite contribute to the low sound velocities of subducted basalt and may provide an alternative interpretation for the low seismic velocity signatures in the lower mantle.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145077250","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":"Decoupling of High-Pressure H2 Production From Serpentinization and Magnetite in Subduction Zones","authors":"G. Siron,&nbsp;M. Blanchard,&nbsp;J. Aufort,&nbsp;S. E. Williams,&nbsp;A. Vitale Brovarone","doi":"10.1029/2024JB030567","DOIUrl":"10.1029/2024JB030567","url":null,"abstract":"<p>Serpentinization plays a central role in geological, geochemical, and microbiological processes at various depths and conditions. While the mineralogical and geochemical patterns of serpentinization are known at low-pressure and temperature conditions characteristic of sub-seafloor or shallow continental conditions, and favorable conditions for H₂ and abiotic CH₄ formation at these conditions are also known, equivalent processes happening at greater depths and elevated temperatures in subduction zones are less constrained. Here we present the results of reaction path thermodynamic models simulating irreversible interactions between chemically complex metamorphic aqueous fluids and ultramafic rocks at conditions relevant to three evolutionary stages of subduction, from infancy to maturity, and for three different fluid sources, metabasite, metasediment, and serpentinite. At subduction zone conditions from 300 to 700°C and 1.5–3.0 GPa, serpentinization, H₂, and abiotic CH₄ production are stronger for high orthopyroxene/olivine ratios, with negligible serpentinization for olivine-rich starting materials. Furthermore, above brucite dehydration, we found that magnetite production and H₂ and CH₄ concentrations are decoupled from serpentinization. The degree of serpentinization of the mantle wedge and geophysical fingerprints conventionally attributed to it do not necessarily reflect fluid availability or define potential source regions for deep H₂-CH₄-rich fluids. A new isotope database for complex carbonic fluids allowed computing carbon isotope mass balances for each thermodynamic model. The observed decoupling determines large redox variability, ultimately resulting in carbon isotope signature of abiotic methane within approximately a 15‰ range for different mantle rocks, with important implications on the isotopic diversity of high-temperature abiotic CH₄.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145071968","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":"Reliable Multimodal Attenuation Estimation of Surface Waves Using Diffuse Ambient Noise: Theory and Applications","authors":"Bo Yang,&nbsp;Haoran Meng,&nbsp;Shichuan Yuan,&nbsp;Xiaofei Chen","doi":"10.1029/2025JB031418","DOIUrl":"10.1029/2025JB031418","url":null,"abstract":"<p>Seismic ambient noise often lacks the ideal diffuse characteristics required to reliably reconstruct surface wave empirical Green's functions, particularly in terms of amplitude information for attenuation estimation. Conventional methods, such as long-time stacking and coherency measurements, rely on assumptions that the ensemble average exhibits diffuse wavefield properties and that only the fundamental surface wave mode is present. To overcome these limitations, we propose an advanced method for multimodal surface wave attenuation estimation. This approach incorporates diffuseness quantification and excludes non-diffuse waveform segments to improve coherency reliability. Additionally, we derive a theoretical expression for the multiple-mode noise field, with multimodal coherency represented as a weighted superposition of individual mode coherences. The theory is applied to isolated target modes in the frequency-wavenumber domain using spatially windowed frequency-Hankel transform pairs. We validate the method using synthetic diffuse noise data and subsequently apply it to a subset of the USArray and a quasi-linear array in the Tarim Basin. The proposed method not only strengthens the robustness of fundamental mode attenuation estimation but also enables the estimation of higher-mode attenuation. These reliable multimodal attenuation estimates can significantly improve the robustness of <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>Q</mi>\u0000 </mrow>\u0000 <annotation> $Q$</annotation>\u0000 </semantics></math>-value tomography, thereby advancing our understanding of Earth's interior.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038202","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":"The Application of Remote Sensing Data (SAR, Thermal and Optical) and Geodetic Modeling to Investigate the Volcanic Activity at Semeru Volcano (Indonesia)","authors":"Federico Galetto,&nbsp;Diego Reale,&nbsp;Diego Coppola,&nbsp;Eugenio Sansosti,&nbsp;Matthew E. Pritchard","doi":"10.1029/2025JB031428","DOIUrl":"10.1029/2025JB031428","url":null,"abstract":"<p>Semeru (Indonesia) is a persistent eruptive volcano, but its volcanic activity remains poorly constrained. Here we used a combination of different remote sensing data to improve the understanding of Semeru. By differencing high resolution (2m) Digital Elevation Models (DEM) derived from optical data (EarthDEMs), we estimated a bulk volume of ∼43.5 × 10⁶ m³ of lavas erupted from 2014 to 2020. Thermal data from MIROVA show multiple peaks in the volcanic radiative power and in the cumulative Volcanic Radiant Energy (VRE) related with lava flow extrusions. Time series of deformation, obtained with Synthetic Aperture Radar Interferometry (InSAR) from Sentinel-1 data, show on both orbits negative line-of-sight displacements of the SE flank from 2014 to 2023. The observed displacements can be related to surface processes or to a limited (≤1 × 10⁶ m³) deflation of a shallow (&lt;2 km) reservoir, modeled with a Boundary Element Method. We used the volume estimated by EarthDEMs to calibrate the VRE and to calculate the erupted volume of lava from VRE for periods not covered by EarthDEM, allowing in the future the near-real-time estimation of volumes from MIROVA data. Erupted volumes of lava over the time reveal a steady state activity. Our data suggest that the persistent volcanic activity at Semeru is fed by deep portions of the magmatic system, while the possible shallow reservoir is a hydrothermal or an ephemeral magma reservoir. This study highlights the importance of using different remote sensing data to monitor, quantify, and interpret the volcanic activity in poorly monitored and studied volcanoes.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038201","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":"Delayed Dynamic Triggering and Enhanced High-Frequency Seismic Radiation From Brittle Rock Damage in 3D Dynamic Rupture Simulations","authors":"Zihua Niu,&nbsp;Alice-Agnes Gabriel,&nbsp;Yehuda Ben-Zion","doi":"10.1029/2025JB031632","DOIUrl":"10.1029/2025JB031632","url":null,"abstract":"<p>Using a novel high-performance computing implementation of a nonlinear continuum damage-breakage model, we explore interactions between 3D co-seismic off-fault damage, seismic radiation, and rupture dynamics. Our simulations demonstrate that off-fault damage enhances high-frequency wave radiation above 1 Hz, reduces rupture speed and alters the total kinetic energy. We identify distinct damage regimes separated by solid-granular transition, with smooth distributions under low damage conditions transitioning to localized, mesh-independent shear bands upon reaching brittle failure. The shear band orientations depend systematically on the background stress and agree with analytical predictions. The brittle damage inhibits transitions to supershear rupture propagation and the rupture front strain field results in locally reduced damage accumulation during supershear transition. The dynamically generated damage yields uniform and isotropic ratios of fault-normal to fault-parallel high-frequency ground motions. Co-seismic damage zones exhibit depth-dependent width variations, becoming broader near the Earth's surface consistent with field observations, even under uniform stress conditions. We discover a new delayed dynamic triggering mechanism in multi-fault systems, driven by reductions in elastic moduli and the ensuing stress heterogeneities in 3D tensile fault step-overs. This mechanism affects the static and dynamic stress fields and includes the formation of high shear-traction fronts around localized damage zones. The brittle damage facilitates rupture cascading across faults, linking delay times directly to damage rheology and fault zone evolution. Our results help explain near-fault high-frequency isotropic radiation and delayed rupture triggering, improving our understanding of earthquake processes, seismic wavefields and fault system interactions.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JB031632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145038362","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":"Role of Slabs in Postseismic Deformation Following Deep Earthquakes","authors":"Chao Zhang,&nbsp;Sunyoung Park","doi":"10.1029/2025JB031291","DOIUrl":"10.1029/2025JB031291","url":null,"abstract":"<p>The Earth's viscoelastic postseismic deformation reflects its rheological structure. Even though low-viscosity structures, such as the asthenosphere, are often thought to dominate postseismic deformation induced by shallow earthquakes, high-viscosity subducting slabs have also been found to considerably affect postseismic deformation following subduction zone earthquakes including deep-focus events. However, for deep earthquakes, the exact mechanism by which slab structures influence stress relaxation and the resulting deformation processes is poorly understood. Here, we conduct the first systematic study investigating the effect of a slab on the Earth's viscoelastic relaxation following a <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mo>∼</mo>\u0000 </mrow>\u0000 <annotation> $mathit{sim }$</annotation>\u0000 </semantics></math>600-km deep earthquake. We perform numerical modeling with and without a subducting slab for representative source mechanisms and slab geometries and compare the results. In general, we find that the slab structure significantly impedes stress relaxation. The high-viscosity slab sustains most of the coseismic stress, which leads to stress concentration within it; in the surrounding mantle, the relaxation of stress also becomes much slower compared to the case without the slab. Such differences in the spatiotemporal evolution of stress, which are further influenced by the geometries of the earthquake source and slab structure, result in the distinct patterns of postseismic deformation at the Earth's surface. Interestingly, we also find that even an extremely confined region of high viscosity surrounding the earthquake source can generate a significant slab effect. Our study provides a general framework for interpreting deep earthquake induced postseismic deformation and an improved understanding of the relationship between the Earth's 3D rheological structures and viscoelastic relaxation processes.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JB031291","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037935","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":"RNN-DAS: A New Deep Learning Approach for Detection and Real-Time Monitoring of Volcano-Tectonic Events Using Distributed Acoustic Sensing","authors":"J. Fernández-Carabantes,&nbsp;M. Titos,&nbsp;L. D'Auria,&nbsp;J. García,&nbsp;L. García,&nbsp;C. Benítez","doi":"10.1029/2025JB031756","DOIUrl":"10.1029/2025JB031756","url":null,"abstract":"<p>We present a novel Deep Learning model based on recurrent neural networks (RNNs) with long short-term memory (LSTM) cells, designed as a real-time volcano-seismic signal recognition system for distributed acoustic sensing (DAS) measurements. The model was trained on an extensive database of volcano-tectonic events derived from the co-eruptive seismicity of the 2021 La Palma eruption, recorded by a High-fidelity submarine distributed acoustic sensing array near the eruption site. The features used for supervised model training, based on the average signal energy in frequency bands, enable the model to effectively leverage the spatio-temporal contextual information of seismo-volcanic signals provided by the technique. The proposed model not only detects the presence of volcano-tectonic events but also analyzes their temporal evolution, selecting and classifying their complete waveforms with an accuracy of approximately 97%. Furthermore, the model has demonstrated robust performance in generalizing to other time intervals and volcanoes. Such results highlight the potential of using RNN-based approaches with LSTM cells for DAS systems located in volcanic regions, enabling fast, automatic analysis with low computational requirements and minimal retraining. This allows continuous real-time monitoring of seismicity while facilitating the creation of labeled seismic catalogs directly from DAS measurements, representing a significant advancement in using DAS technology as a viable tool to study active volcanoes and their seismic activity.</p>","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 9","pages":""},"PeriodicalIF":4.1,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025JB031756","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145037684","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}