Journal of Geophysical Research: Solid Earth最新文献_第9页

Timescales of Surface Faulting Preservation in Low-Strain Intraplate Regions From Landscape Evolution Modeling and the Geomorphic and Historical Record 从景观演化模型和地貌历史记录看低应变板内区域地表断裂保存的时间尺度

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-14 DOI: 10.1029/2024JB029966

Jessica A. Thompson Jobe, Nadine G. Reitman

{"title":"Timescales of Surface Faulting Preservation in Low-Strain Intraplate Regions From Landscape Evolution Modeling and the Geomorphic and Historical Record","authors":"Jessica A. Thompson Jobe, Nadine G. Reitman","doi":"10.1029/2024JB029966","DOIUrl":"https://doi.org/10.1029/2024JB029966","url":null,"abstract":"Large surface-rupturing intraplate earthquakes in stable continental regions (SCRs) are uncommon globally and have recurrence intervals of thousands to hundreds of thousands of years based on the paleoseismic and geomorphic record, challenging accurate active fault identification in these regions. To constrain the timescales of preservation for scarps created by surface ruptures from dip-slip earthquakes, we use a two-dimensional scarp diffusion model for typical intraplate settings and explore which parameters influence fault scarp preservation. These parameters include the coseismic vertical surface offset, the recurrence interval of similar magnitude earthquakes, diffusivity (as a proxy for mean annual precipitation rate), and the erodibility of the surficial material. We constrain parameter ranges from a compilation of historical surface ruptures in intraplate settings in a variety of climates, including the Central and Eastern United States, Australia, Europe, Central Asia (Mongolia, China), India, and West Africa. The timescales of scarp preservation from landscape evolution modeling agree well with observations of scarp preservation in low-strain SCR and intraplate tectonic settings, with some notable exceptions for Australian scarps. We find that the erodibility of the surficial material and earthquake recurrence interval have a stronger effect on the timescales of scarp preservation than diffusivity or coseismic vertical surface offset. Our model results may aid in identifying and characterizing subtle, slow-moving active faults in low-strain SCR and intraplate tectonic settings for different tectonic, geomorphic, and climatic characteristics. Accurate fault locations and characterization from the landscape record has implications for both probabilistic seismic and fault displacement hazard analyses.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144281419","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}

引用次数: 0

Channeling, Clogging and Permeability Oscillations: Different Macroscopic Regimes in Mineral Replacement 通道、堵塞和渗透率振荡：矿物替代的不同宏观机制

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-12 DOI: 10.1029/2024JB031081

Agnieszka Budek, Piotr Szymczak

{"title":"Channeling, Clogging and Permeability Oscillations: Different Macroscopic Regimes in Mineral Replacement","authors":"Agnieszka Budek, Piotr Szymczak","doi":"10.1029/2024JB031081","DOIUrl":"https://doi.org/10.1029/2024JB031081","url":null,"abstract":"We consider a porous medium infiltrated by a reactive fluid which triggers coupled dissolution-precipitation reactions at pore surfaces. To study these processes, we model the medium as a system of interconnected pipes with the diameter of each segment changing in proportion to the local reactant consumption. With this model, we investigate different growth regimes in an evolving porous medium, allowing for both erosion and precipitation of the dissolved material. The interplay of flow, transport and reaction in such a system can give rise to a variety of patterns: from spontaneous channeling to nearly homogeneous transformation of the entire rock matrix into the product phase. Interestingly, even if the product phase has a larger molar volume than the parent phase, clogging in such a system can be avoided, due to the interplay of dissolution and precipitation resulting in the continuous creation of new flow paths. These results can be relevant for the analysis of carbonation reactions, in which an important goal is to avoid clogging of the pore space that can lead to permeability reduction and the overall slowdown of the process.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264500","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}

引用次数: 0

3-D Mantle Flow and Structure of the Mediterranean From Combined P-Wave and Splitting Intensity Anisotropic Tomography 从联合纵波和分裂强度各向异性层析成像的三维地中海地幔流动和结构

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-11 DOI: 10.1029/2024JB030883

F. Rappisi, R. Lo Bue, B. P. Vanderbeek, J. M. Confal, C. Erman, P. Baccheschi, S. Pondrelli, T. Eken, S. Yolsal-Çevikbilen, M. Faccenda

{"title":"3-D Mantle Flow and Structure of the Mediterranean From Combined P-Wave and Splitting Intensity Anisotropic Tomography","authors":"F. Rappisi, R. Lo Bue, B. P. Vanderbeek, J. M. Confal, C. Erman, P. Baccheschi, S. Pondrelli, T. Eken, S. Yolsal-Çevikbilen, M. Faccenda","doi":"10.1029/2024JB030883","DOIUrl":"https://doi.org/10.1029/2024JB030883","url":null,"abstract":"We present a novel three-dimensional anisotropic seismic tomography model of the Mediterranean region, achieved through the simultaneous inversion of P-wave travel-times and SKS splitting intensity. This dual approach has allowed us to obtain a comprehensive tomographic model that not only delineates the primary structural features of the area but also sheds light on its tectonic evolution. Our findings reveal that the isotropic component of the model is dominated by fast anomalies associated with retreating, stagnant, and detached slab segments including the Alboran, Apennine, and Alpine slabs in the central and western Mediterranean, and the Dinaric, Carpathian, and Hellenic slabs in the east. Slower mantle structures are associated with slab windows and back-arc basin formation, such as those observed in the Tyrrhenian, Apennine and Hellenic regions. The recovered anisotropic patterns provide crucial insights into the tectonic history of the Mediterranean, highlighting periods of collision and tectonic relaxation. Notably, we observe a range of plunge angles, with both near-horizontal and steeply dipping anisotropic fabrics present in different regions, reflecting the influence of horizontal and vertical asthenospheric flow. By interpreting the high-velocity zones as subducting lithosphere, we construct a detailed 3-D model of the main slabs and analyzed the surrounding P-wave anisotropic patterns. This work represents the first comprehensive anisotropic tomography study of the entire Mediterranean region.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030883","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255943","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}

引用次数: 0

High Resolution Shallow Structure of Ebao Basin Revealed With DAS Ambient Noise Tomography and Its Relation to Earthquake Ground Motion DAS环境噪声层析成像揭示鄂宝盆地高分辨率浅层构造及其与地震地震动的关系

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-10 DOI: 10.1029/2024JB029874

Song Wang, Zhenghong Song, Xiangfang Zeng, Benxin Chi, Jun Xie, Feng Bao

{"title":"High Resolution Shallow Structure of Ebao Basin Revealed With DAS Ambient Noise Tomography and Its Relation to Earthquake Ground Motion","authors":"Song Wang, Zhenghong Song, Xiangfang Zeng, Benxin Chi, Jun Xie, Feng Bao","doi":"10.1029/2024JB029874","DOIUrl":"https://doi.org/10.1029/2024JB029874","url":null,"abstract":"The Ebao Basin, which locates along the northwest segment of the Qilian-Haiyuan fault, has experienced several destructive earthquakes in past decades. A 10 km long distributed acoustic sensing (DAS) array was deployed with an existing telecom fiber-optic cable after the 2022 Mw6.6 Menyuan earthquake, which destroyed high-speed railways and highways in this region. The DAS array continuously recorded ambient noise and earthquake signals during the 5-day deployment period. Noise cross-correlation functions (NCFs) were calculated, and the Rayleigh wave signal clearly emerged on the NCFs. The phase velocities of the fundamental mode between 2.5 and 17 Hz were measured with the modified Frequency-Bessel transform method. The S-wave velocity structure along the cable, extending to a depth of 200 m, was constructed using the surface wave tomography method. It consists of three blocks, with velocity variations of up to 12%. P-wave delay times of regional earthquakes support the lateral variation among the three blocks. Both Vs30 and site amplification predicted with our S-wave velocity model correlate well with the ground motion induced by local earthquakes. Precursor and coda waves on the NCFs reveal four possible faults, and fault zone scattered waves are also observed on the record of local earthquakes.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244812","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}

引用次数: 0

Magma-Assisted Flexure of Hawaiian Lithosphere Inferred From Three-Dimensional Models of Lithospheric Flexure Constrained by Active Source Seismic Data 由活跃震源数据约束下岩石圈弯曲三维模型推断的夏威夷岩石圈岩浆辅助弯曲

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-10 DOI: 10.1029/2024JB030376

D. Douglas, G. Ito, B. Boston, R. Dunn, J. Naliboff, P. Wessel, A. B. Watts, D. Shillington, P. Cilli

{"title":"Magma-Assisted Flexure of Hawaiian Lithosphere Inferred From Three-Dimensional Models of Lithospheric Flexure Constrained by Active Source Seismic Data","authors":"D. Douglas, G. Ito, B. Boston, R. Dunn, J. Naliboff, P. Wessel, A. B. Watts, D. Shillington, P. Cilli","doi":"10.1029/2024JB030376","DOIUrl":"https://doi.org/10.1029/2024JB030376","url":null,"abstract":"Reprocessed and newly acquired seismic data provide new constraints on lithospheric flexure profiles beneath the Hawaiian Islands. We use these new observations and three-dimensional numerical models of lithospheric deformation combining elasticity, brittle failure, low-temperature plasticity (LTP) and high-temperature creep deformation mechanisms to constrain the thermal structure and rheology of the oceanic lithosphere. When simulating normal oceanic lithospheric conditions with experimentally-derived LTP flow laws, the lithosphere flexes with too little amplitude and over too large a wavelength compared to observations. This result supports prior studies which call on the need to (a) adjust the LTP flow laws or, alternatively, to (b) account for magma-assisted flexural weakening of the lithosphere. Here, models that explore reductions in the activation energy of LTP are able to explain the observations of flexure with a smaller reduction than previously suggested. Models that explore elevated temperatures attributed to hotspot magmatism localized beneath the island edifices also produce close fits to the observed flexural profiles. Although the two factors cannot be distinguished based on fits to the flexure profiles, localized magma-assisted flexural weakening is supported by recent studies of geothermobarometry of pyroxenite xenoliths from O'ahu, seismic structure and patterns of seismicity beneath the Hawaiian chain. If magma-assisted flexure is a common phenomenon at other ocean islands and seamounts, it could explain similarities in elastic plate thickness with subduction zones as well as differences with fracture zones globally.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030376","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255870","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}

引用次数: 0

Pre-Existing Structures Control the Orientation of Strike-Slip Faulting During the 2021 Dike Intrusion at Fagradalsfjall, Iceland 2021年冰岛Fagradalsfjall决堤侵入期间，预先存在的构造控制着走滑断层的走向

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-10 DOI: 10.1029/2024JB030162

E. Glastonbury-Southern, T. Winder, N. Rawlinson, R. S. White, T. Greenfield, C. A. Bacon, T. Ágústsdóttir, B. Brandsdóttir, E. Á. Gudnason, G. P. Hersir, T. J. Fischer, J. Doubravová, P. Hrubcová, E. P. S. Eibl

{"title":"Pre-Existing Structures Control the Orientation of Strike-Slip Faulting During the 2021 Dike Intrusion at Fagradalsfjall, Iceland","authors":"E. Glastonbury-Southern, T. Winder, N. Rawlinson, R. S. White, T. Greenfield, C. A. Bacon, T. Ágústsdóttir, B. Brandsdóttir, E. Á. Gudnason, G. P. Hersir, T. J. Fischer, J. Doubravová, P. Hrubcová, E. P. S. Eibl","doi":"10.1029/2024JB030162","DOIUrl":"https://doi.org/10.1029/2024JB030162","url":null,"abstract":"The 2021 Fagradalsfjall inflation and dike intrusion marked the initiation of a new era of volcanism on Iceland's Reykjanes Peninsula. We present a large automatic catalog consisting of more than 80,000 earthquake hypocenters spanning the full period of the dike intrusion, which were derived from seismic data recorded by a dense network of seismometers. The 9–10 km long dike exhibits a two-segment geometry of similar lengths. Linear regression on a relatively relocated subset of over 12,000 earthquakes revealed a strike of 029° with a standard deviation of 2° in the southern segment, and 046° with a standard deviation of 1° in the northern segment of the dike. A total of 97 detailed fault plane solutions from selected subsets of events provide new insight into the controls on faulting, showing almost exclusively right-lateral strike-slip/oblique-slip faulting associated with the dike intrusion, and a lack of left-lateral strike-slip fault motion. The alignment of fault planes is consistent with the orientation of pre-existing structures, within uncertainty estimates. In light of these observations, we conclude that the dominant controlling factor on the orientation of dike-related faulting is the extensive network of pre-existing structures formed by the active transtensional plate boundary along the Reykjanes Peninsula.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144245056","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}

引用次数: 0

Crustal Structure Along and Surrounding the Hawaiian Islands: Volcanic Island Construction Across Scarred Oceanic Crust 沿夏威夷群岛及其周围的地壳结构：横跨伤痕累累的海洋地壳的火山岛构造

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-10 DOI: 10.1029/2024JB030377

Brian Boston, Donna J. Shillington, Anthony B. Watts, Philip Cilli, Robert Dunn, Garrett Ito, Paul Wessel, Uri ten Brink

{"title":"Crustal Structure Along and Surrounding the Hawaiian Islands: Volcanic Island Construction Across Scarred Oceanic Crust","authors":"Brian Boston, Donna J. Shillington, Anthony B. Watts, Philip Cilli, Robert Dunn, Garrett Ito, Paul Wessel, Uri ten Brink","doi":"10.1029/2024JB030377","DOIUrl":"https://doi.org/10.1029/2024JB030377","url":null,"abstract":"The Hawaiian Ridge is a classic example of an intraplate volcanic island chain emplaced on oceanic lithosphere. We seek to constrain both the deformation from island loading around the Hawaiian Ridge and the influence of the oceanic lithosphere, including the Molokaʻi fracture zone (MFZ), on off-axis volcanic emplacement. To examine these processes, we conducted a marine geophysical experiment in 2018 that included the acquisition of eight multichannel seismic reflection lines and used a 6,600 in3 tuned air gun array and an ultra-long hydrophone streamer cable towed behind R/V Marcus G. Langseth across and around the southern Hawaiian Ridge. We image both the top of igneous oceanic crust and the Moho, and we observe significant variations in regional crustal structure and thickness variations, Moho characteristics, the locations of the buried MFZ, and the flexure of the Pacific oceanic lithosphere under the Hawaiian Ridge. We observe up to ∼4.5 km of deflection of the igneous oceanic crust in response to the volcanic load with sediment thickness increasing to ∼3–3.4 km near the ridge but not correlating with the deflection. A systematic difference in igneous oceanic crustal thickness is found north (average ∼5.2 km) and south (average ∼5.9 km), of the MFZ that also correspond to changes in Moho characteristics. The MFZ itself is associated with the largest crustal thickness variations (∼3.7–7.6 km). Magma ascent through these different crustal regions may account for some variations of magmatic flux to the surface along the Hawaiian Ridge.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030377","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255901","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}

引用次数: 0

The Dynamics of Fast and Slow Earthquake Ruptures in Viscoelastic Materials 粘弹性材料的快、慢地震破裂动力学

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-10 DOI: 10.1029/2024JB030663

Huihui Weng

{"title":"The Dynamics of Fast and Slow Earthquake Ruptures in Viscoelastic Materials","authors":"Huihui Weng","doi":"10.1029/2024JB030663","DOIUrl":"https://doi.org/10.1029/2024JB030663","url":null,"abstract":"Classical theories using linear elasticity predict that crack propagation asymptotically approaches a limiting speed, beyond which the energy balance becomes unphysical. However, geophysical and laboratory observations show that ruptures can propagate at either a very low, stable speed or a significantly high speed. Here, we first use numerical simulations to show that frictional ruptures in viscoelastic materials can steadily propagate at a terminal speed, rather than asymptotically approaching the classical speed limit. The simulated terminal speed spans a continuum of values, ranging from slow ruptures to supershear ruptures. We then develop a new theory incorporating viscoelasticity to predict all simulated rupture speeds. In addition to the ratio of fracture energy to static energy release rate, we find that three length scales also play a crucial role in governing the energy balance during rupture in viscoelastic materials. The theory predicts that stable rupture speeds are energetically allowed to be very small, which helps explain the widespread occurrence of slow earthquakes. Beyond the classical speed limit, the energy balance becomes independent of macroscopic length scales, being controlled solely by the local properties around the rupture tip. Furthermore, we find that the effects of viscoelasticity in fault zones are significant in earthquake rupture propagation, even when the fault-zone geometrical scales are short relative to other fault dimensions. These numerical and theoretical findings fundamentally advance our understanding of dynamic rupture propagation.","PeriodicalId":15864,"journal":{"name":"Journal of Geophysical Research: Solid Earth","volume":"130 6","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1029/2024JB030663","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244813","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}

引用次数: 0

Fine Detection of Transient Signals in GNSS Time Series Using Multi-Station Hankel Spectrum Analysis 基于多站汉克尔频谱分析的GNSS时间序列暂态信号精细检测

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-09 DOI: 10.1029/2024JB030672

Kunpeng Shi, Xiaodong Chen, Heping Sun, Hao Ding, Rumeng Guo, Xingli Fan

{"title":"Fine Detection of Transient Signals in GNSS Time Series Using Multi-Station Hankel Spectrum Analysis","authors":"Kunpeng Shi, Xiaodong Chen, Heping Sun, Hao Ding, Rumeng Guo, Xingli Fan","doi":"10.1029/2024JB030672","DOIUrl":"10.1029/2024JB030672","url":null,"abstract":"Fine detection of micro-transient deformations exhibiting diverse spatiotemporal patterns is crucial for unraveling geophysical processes in geodetic data sets, despite the challenges posed by high noise levels and correlated periodic signals. In this study, we extend the application of Hankel Spectrum Analysis (HSA, proposed by Shi and Ding (2023), https://doi.org/10.1029/2023jb026438) to record common modes of transient variability. This method employs a versatile multi-transient function to model various transient motions and decompose signals into three components: periodic oscillation, transient deformation, and background noise in GNSS time series. In multivariate data sets, we upgrade HSA to multi-station HSA that can better exploit the spatiotemporal correlations of geophysical fields, allowing for a more comprehensive extraction of transient motions shared across each series. This research first applies multi-station HSA to GPS observation arrays to reanalyze the history of micro-deformation events at the Akutan volcano. After meticulously filtering out non-tectonic motions (e.g., sea-level and loading effects) across semi-annual, annual, and decadal variability, our method successfully identifies repetitive exponent transient growth corresponding to the radial extension inflation of each cycle. Further numerical modeling of these continuous transient deformations enables us to track the migration of the geophysical magma source (shifted to the northwest at a depth of ∼4 km) and the pressure response of the storage system (residuals of ∼5.7 × 106 m3). Since 2014 (cycle 3), there has been an abnormal occurrence of high correlation in transient earthquake swarms, indicating magma intrusion into the brittle rock.","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/10.1029/2024JB030672","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238025","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}

引用次数: 0

A Simulator of Earthquakes and Aseismic Slip on a Heterogeneous Strike-Slip Fault (HFQsim) With Static/Kinetic Friction and Temperature-Dependent Creep 具有静/动摩擦和温度相关蠕变的非均质走滑断层（HFQsim）地震和地震滑动模拟器

IF 3.9 2区地球科学

Journal of Geophysical Research: Solid Earth Pub Date : 2025-06-09 DOI: 10.1029/2024JB030680

Xiaoyu Zhou, Yehuda Ben-Zion

{"title":"A Simulator of Earthquakes and Aseismic Slip on a Heterogeneous Strike-Slip Fault (HFQsim) With Static/Kinetic Friction and Temperature-Dependent Creep","authors":"Xiaoyu Zhou, Yehuda Ben-Zion","doi":"10.1029/2024JB030680","DOIUrl":"10.1029/2024JB030680","url":null,"abstract":"We develop an earthquake simulator to study the partitioning of seismic/aseismic slip and dynamics of Earthquakes on a Heterogeneous strike-slip Fault (HFQsim) using a generalized model of a discrete fault governed by static/dynamic friction and creep in an elastic half-space. Previous versions of the simulator were shown to produce various realistic seismicity patterns (e.g., frequency-magnitude event statistics, hypocenter and slip distributions, temporal occurrence) using friction levels and creep properties that vary in space but are fixed in time. The new simulator incorporates frictional heat generation by earthquake slip leading to temperature rises, subsequent diffusion cooling into the half space, and time-dependent creep on the fault. The model assumes a power law dependence of creep velocity on the local shear stress, with temperature-dependent coefficients based on the Arrhenius equation. Temperature rises due to seismic slip produce increased aseismic slip, which can lead to further stress concentrations, aftershocks, and heat generation in a feedback loop. The partitioning of seismic/aseismic slip and space-time evolution of seismicity are strongly affected by the temperature changes on the fault. The results are also affected significantly by the difference between the static and kinetic friction levels. The model produces realistic spatio-temporal distribution of seismicity, transient aseismic slip patterns, mainshock-aftershock sequences, and a bimodal distribution of earthquakes with background and clustered events similar to observations. The HFQsim may be used to clarify relations between fault properties and different features of seismicity and aseismic slip, and to improve the understanding of failure patterns preceding large earthquakes.","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/10.1029/2024JB030680","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144238026","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}

引用次数: 0