Earthquake Science最新文献_第4页

Overview of the focus issue on enhancing earthquake research through geomagnetic and seismic data analysis 通过地磁和地震资料分析加强地震研究的重点问题综述

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-27 DOI: 10.1016/j.eqs.2025.01.001

Frédéric Masson , Omar M. Saad , Mohamed Abdel Zaher , Xiaodong Song

引用次数: 0

Monitoring seismic velocity changes in the Dongtan Coal Mine using ambient noise correlation 利用环境噪声相关技术监测东滩煤矿地震速度变化

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.08.001

Chao Kong , Kai Zhan , Xiaotao Wen , Ping Song , Lianhai Zhang , Hanying Ding

{"title":"Monitoring seismic velocity changes in the Dongtan Coal Mine using ambient noise correlation","authors":"Chao Kong , Kai Zhan , Xiaotao Wen , Ping Song , Lianhai Zhang , Hanying Ding","doi":"10.1016/j.eqs.2024.08.001","DOIUrl":"10.1016/j.eqs.2024.08.001","url":null,"abstract":"<div><div>This study analyzed ambient seismic noise using the MSNoise package to monitor temporal changes in the underground seismic wave velocity in Mining Area 6 of the Dongtan Coal Mine in China. The data was recorded continuously over 76 days by 7 three-component stations and 10 single-component microseismic stations deployed in Dongtan Coal Mine, with station spacing ranging from 0.1 km to approximately 3 km. Using the causal and non-causal components of the <em>Z</em>-component cross-correlation function, along with moving-window cross-spectrum analysis and cumulative calculations with a 5-day window overlay, stable seismic velocity changes were obtained in the frequency band of 0.1 to 2 Hz. We found a correlation between the timing of average velocity changes and seismic events caused by underground mining processes. In particular, when the relative seismic velocity increased by 0.23%, larger energy minequakes typically occurred. This study shows that ambient noise correlation has great potential for predicting minequakes, guiding pressure-relief production, and providing warnings about the impact of overburden pressure.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"38 1","pages":"Pages 47-55"},"PeriodicalIF":1.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Assessing the data quality and seismic monitoring capabilities of the Belt and Road GNSS network 评估“一带一路”GNSS网络的数据质量和地震监测能力

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.09.007

Yu Li , Yinxing Shao , Tan Wang , Yuebing Wang , Hongbo Shi

{"title":"Assessing the data quality and seismic monitoring capabilities of the Belt and Road GNSS network","authors":"Yu Li , Yinxing Shao , Tan Wang , Yuebing Wang , Hongbo Shi","doi":"10.1016/j.eqs.2024.09.007","DOIUrl":"10.1016/j.eqs.2024.09.007","url":null,"abstract":"<div><div>The Belt and Road global navigation satellite system (B&R GNSS) network is the first large-scale deployment of Chinese GNSS equipment in a seismic system. Prior to this, there have been few systematic assessments of the data quality of Chinese GNSS equipment. In this study, data from four representative GNSS sites in different regions of China were analyzed using the G-Nut/Anubis software package. Four main indicators (data integrity rate, data validity ratio, multi-path error, and cycle slip ratio) used to systematically analyze data quality, while evaluating the seismic monitoring capabilities of the network based on earthquake magnitudes estimated from high-frequency GNSS data are evaluated by estimating magnitude based on high-frequency GNSS data. The results indicate that the quality of the data produced by the three types of Chinese receivers used in the network meets the needs of earthquake monitoring and the new seismic industry standards, which provide a reference for the selection of equipment for future new projects. After the B&R GNSS network was established, the seismic monitoring capability for earthquakes with magnitudes greater than <em>M</em><sub>W</sub>6.5 in most parts of the Sichuan-Yunnan region improved by approximately 20%. In key areas such as the Sichuan-Yunnan Rhomboid Block, the monitoring capability increased by more than 25%, which has greatly improved the effectiveness of regional comprehensive earthquake management.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"38 1","pages":"Pages 56-66"},"PeriodicalIF":1.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 catalog of the Luxian (Sichuan, China) MS6.0 earthquake sequence and analysis of the seismogenic structures 四川芦仙MS6.0级地震序列的高分辨率目录及发震构造分析

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.09.004

Huili Guo , Dahu Li , Pingping Wu , Qiyan Yang , Ningbo Jiang , Mi Gao , Zhifeng Ding

{"title":"High resolution catalog of the Luxian (Sichuan, China) MS6.0 earthquake sequence and analysis of the seismogenic structures","authors":"Huili Guo , Dahu Li , Pingping Wu , Qiyan Yang , Ningbo Jiang , Mi Gao , Zhifeng Ding","doi":"10.1016/j.eqs.2024.09.004","DOIUrl":"10.1016/j.eqs.2024.09.004","url":null,"abstract":"<div><div>The epicenter of the Luxian <em>M</em><sub>S</sub>6.0 earthquake on September 16, 2021, was located in the southern Sichuan Basin, which is a historically seismically quiescent area. In recent years, the frequency of earthquakes has increased with the large-scale exploitation of shale gas. No evident surface fractures or seismic faults were observed after the Luxian earthquake. Based on high-quality data recorded by a dense seismic array composed of 70 portable stations with an average spacing of 2–3 km, a high-resolution seismic catalog was constructed for 7 days before and 36 days after the <em>M</em><sub>S</sub>6.0 earthquake using LOC-FLOW, an effective workflow of phase picking, phase association, and earthquake location. Based on the new earthquake catalog, four earthquake clusters that occurred within the Yujiasi Syncline during this period were identified. Among them, the <em>M</em><sub>S</sub>6.0 main earthquake sequence had a NW-SE trend and inclined towards the SW, with a length of approximately 8 km and width of 5 km. The <em>M</em><sub>S</sub>6.0 earthquake sequence only appeared after the mainshock. The other three clusters were located in the northeast direction of the <em>M</em><sub>S</sub>6.0 earthquake sequence, all of which were NE-SW trending strips and had no evident direct correlation with the <em>M</em><sub>S</sub>6.0 mainshock. The focal depth was concentrated in the range of 2–7 km. Based on the seismic sequence profile and structural background, the <em>M</em><sub>S</sub>6.0 seismic structure may be a blind buried fault zone with a NW strike composed of multiple small conjugate faults with NE and SW dip. The fault was not exposed on the surface and was related to the detachment structure in the deep part of the Sichuan Basin.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"38 1","pages":"Pages 33-46"},"PeriodicalIF":1.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

An illustrated guide to: Distributed and integrated fibre-optic sensing in seismology 图解指南：地震学中的分布式和集成光纤传感

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.09.006

Andreas Fichtner , Fabian Walter , Patrick Paitz , Sara Klaasen , Daniel C. Bowden , Sebastian Noe , Nils Müller , Dominik Husmann , Jacques Morel

引用次数: 0

Machine learning-based aftershock seismicity of the 2015 Gorkha earthquake controlled by flat-ramp geometry and a tear fault 2015年廓尔喀地震的基于机器学习的余震活动，由平斜坡几何形状和撕裂断层控制

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.05.002

Yeyang Kuang , Jiangtao Li

{"title":"Machine learning-based aftershock seismicity of the 2015 Gorkha earthquake controlled by flat-ramp geometry and a tear fault","authors":"Yeyang Kuang , Jiangtao Li","doi":"10.1016/j.eqs.2024.05.002","DOIUrl":"10.1016/j.eqs.2024.05.002","url":null,"abstract":"<div><div>The Main Himalayan Thrust (MHT), where the 2015 <em>M</em><sub>W</sub>7.8 Gorkha earthquake occurred, features the most seismicity of any structure in Nepal. The structural complexity of the MHT makes it difficult to obtain a definitive interpretation of deep seismogenic structures. The application of new methods and data in this region is necessary to enhance local seismic hazard analyses. In this study, we used a well-designed machine learning-based earthquake location workflow (LOC-FLOW), which incorporates machine learning phase picking, phase association, absolute location, and double-difference relative location, to process seismic data collected by the Hi-CLIMB and NAMASTE seismic networks. We built a high-precision earthquake catalog of both the quiet-period and aftershock seismicity in this region. The seismicity distribution suggests that the quiet-period seismicity (388 events) was controlled by a mid-crustal ramp and the aftershock seismicity (12,669 events) was controlled by several geological structures of the MHT. The higher-level detail of the catalogs derived from this machine learning method reveal clearer structural characteristics, showing how the flat-ramp geometry and a possible duplex structure affect the depth distribution of the seismic events, and how a tear fault changes this distribution along strike.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"38 1","pages":"Pages 17-32"},"PeriodicalIF":1.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Post-rifting magmatism at the northern margin of the South China Sea: Evidenced by an ocean bottom seismometer experiment 南海北缘裂谷后岩浆活动：海底地震仪实验的佐证

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2025-02-01 DOI: 10.1016/j.eqs.2024.05.001

Lu Zhang , Chen Cai , Rui Gao

{"title":"Post-rifting magmatism at the northern margin of the South China Sea: Evidenced by an ocean bottom seismometer experiment","authors":"Lu Zhang , Chen Cai , Rui Gao","doi":"10.1016/j.eqs.2024.05.001","DOIUrl":"10.1016/j.eqs.2024.05.001","url":null,"abstract":"<div><div>Magmatism at continental margins is of great significance in understanding the continental rifting. We present a two-dimensional P-wave velocity model derived from an ocean bottom seismometer experiment, conducted across the middle northern continental margin of the South China Sea (SCS). The detailed velocity structures reveal significant heterogeneities extending from the continental shelf to the continent-ocean transition zone. The crust exhibits its greatest thickness below the continental shelf, measuring ∼23 km and gradually thins to ∼13 km at the distal margin. Furthermore, a narrow and distinct continent-ocean transition with only 40-km width is revealed. We also observe a high-velocity layer within the transition zone, reaching thickness of up to 4 km, characterized by P-wave velocities ranging from 7.0 km/s to 7.6 km/s in the lower crust. Based on the syn-rift melt generation using decompression melting model, we ascertain that syn-rift magmatism cannot fully account for the observed thick high-velocity layer. By integrating findings from previous geophysical and geochemical studies presenting extensive volcanic edifice on the seafloor at the northern margin, as well as ocean-island-basalt-type magmatic samples in the SCS area, we propose that post-rifting magmatism associated with the Hainan Plume may have influenced the formation of the high-velocity lower crust within the transition zone and the northern margin of the SCS can thus be recognized as magma-poor type margin.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"38 1","pages":"Pages 1-16"},"PeriodicalIF":1.2,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143153295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2024-09-26 DOI: 10.1016/j.eqs.2024.05.004

Feng Huang , Xueyang Bao , Qili Andy Dai , Xinfu Li

{"title":"Structural similarity of lithospheric velocity models of Chinese mainland","authors":"Feng Huang , Xueyang Bao , Qili Andy Dai , Xinfu Li","doi":"10.1016/j.eqs.2024.05.004","DOIUrl":"10.1016/j.eqs.2024.05.004","url":null,"abstract":"<div><div>Existing lithospheric velocity models exhibit similar structures typically associated with the first-order tectonic features, with dissimilarities due to different data and methods used in model generation. The quantification of model structural similarity can help in interpreting the geophysical properties of Earth’s interior and establishing unified models crucial in natural hazard assessment and resource exploration. Here we employ the complex wavelet structural similarity index measure (CW-SSIM) active in computer image processing to analyze the structural similarity of four lithospheric velocity models of Chinese mainland published in the past decade. We take advantage of this method in its multiscale definition and insensitivity to slight geometrical distortion like translation and scaling, which is particularly crucial in the structural similarity analysis of velocity models accounting for uncertainty and resolution. Our results show that the CW-SSIM values vary in different model pairs, horizontal locations, and depths. While variations in the inter-model CW-SSIM are partly owing to different databases in the model generation, the difference of tomography methods may significantly impact the similar structural features of models, such as the low similarities between the full-wave based FWEA18 and other three models in northeastern China. We finally suggest potential solutions for the next generation of tomographic modeling in different areas according to corresponding structural similarities of existing models.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 6","pages":"Pages 514-528"},"PeriodicalIF":1.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

An illustrated guide to: Parsimonious multi-scale full-waveform inversion 图解指南准多尺度全波形反演

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2024-09-26 DOI: 10.1016/j.eqs.2024.07.004

Andreas Fichtner, Solvi Thrastarson, Dirk-Philip van Herwaarden, Sebastian Noe

{"title":"An illustrated guide to: Parsimonious multi-scale full-waveform inversion","authors":"Andreas Fichtner, Solvi Thrastarson, Dirk-Philip van Herwaarden, Sebastian Noe","doi":"10.1016/j.eqs.2024.07.004","DOIUrl":"10.1016/j.eqs.2024.07.004","url":null,"abstract":"<div><div>Having been a seemingly unreachable ideal for decades, 3-D full-waveform inversion applied to massive seismic datasets has become reality in recent years. Often achieving unprecedented resolution, it has provided new insight into the structure of the Earth, from the upper few metres of soil to the entire globe. Motivated by these successes, the technology is now being translated to medical ultrasound and non-destructive testing. Despite remarkable progress, the computational cost of full-waveform inversion continues to be a major concern. It limits the amount of data that can be exploited, and it largely inhibits quantitative and comprehensive uncertainty analyses. These notes complement a presentation on recent developments in full-waveform inversion that are intended to reduce computational cost and assimilate more data, thereby improving tomographic resolution. The suite of strategies includes flexible and user-friendly spectral-element simulations, the design of wavefield-adapted meshes that harness prior information on wavefield geometry, dynamic mini-batch optimisation that naturally takes advantage of data redundancies, and collaborative multi-scale updating to jointly constrain crustal and mantle structure.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 6","pages":"Pages 574-583"},"PeriodicalIF":1.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of crustal deformation and associated strong motions induced by the 2022 Paktika earthquake, Afghanistan 对 2022 年阿富汗帕克蒂卡地震诱发的地壳变形和相关强烈运动的评估

IF 1.2 4区地球科学

Earthquake Science Pub Date : 2024-09-26 DOI: 10.1016/j.eqs.2024.07.001

A. Bari Jahed , Ömer Aydan , Takashi Ito , Naoki Iwata

{"title":"Evaluation of crustal deformation and associated strong motions induced by the 2022 Paktika earthquake, Afghanistan","authors":"A. Bari Jahed , Ömer Aydan , Takashi Ito , Naoki Iwata","doi":"10.1016/j.eqs.2024.07.001","DOIUrl":"10.1016/j.eqs.2024.07.001","url":null,"abstract":"<div><div>The 2022 Paktika earthquake (moment magnitude: 6.2) occurred on June 22, 2022, near the border between the Khost and Paktika Provinces of Afghanistan, causing heavy damage and casualties in Paktika Province. This study evaluated the crustal deformation and associated strong motions induced by the Paktika earthquake. Crustal deformations were determined using the Differential Interferometric Synthetic Aperture Radar (DInSAR) technique and three-dimensional finite element method (3D-FEM) and the results were compared. The permanent ground displacements obtained from the DInSAR and 3D-FEM analyses were similar in terms of amplitude and areal distribution. Strong motions were estimated using the 3D-FEM with and without considering regional topography. The estimations of maximum ground acceleration, velocity, and permanent ground deformations were compared among each other as well as with those inferred from failures of some simple structures in the Spera and Gayan districts. The inferred maximum ground acceleration and velocity from the failed adobe structures were more than 300 Gal and 50 cm/s, respectively, nearly consistent with the estimates obtained using empirical methods. The empirical method yielded a maximum ground acceleration of 347 Gal, whereas the maximum ground velocity was approximately 50 cm/s. In light of these findings, some surface expressions of crustal deformations and strong ground motions, such as failures of soil and rock slopes and rockfalls, have been presented. The rock slope failures in the epicentral area were consistent with those observed during various earthquakes in Afghanistan and worldwide.</div></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 6","pages":"Pages 546-557"},"PeriodicalIF":1.2,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142322418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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