Earthquake Research Advances最新文献

High-performance CPU-GPU heterogeneous computing method for 9-component ambient noise cross-correlation 九分量环境噪声互关的高性能CPU-GPU异构计算方法

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2024.100357

Jingxi Wang , Weitao Wang , Chao Wu , Lei Jiang , Hanwen Zou , Huajian Yao , Ling Chen

引用次数: 0

Travel-time corrections for stations in the Guangdong seismic network and their impact on earthquake location accuracy 广东地震台网台站的走时校正及其对地震定位精度的影响

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2024.100345

Ming Liang , Xuan Yang , Ce Jiang , Ping Tian , Qingxi Lin , Xijiao Jiang

{"title":"Travel-time corrections for stations in the Guangdong seismic network and their impact on earthquake location accuracy","authors":"Ming Liang , Xuan Yang , Ce Jiang , Ping Tian , Qingxi Lin , Xijiao Jiang","doi":"10.1016/j.eqrea.2024.100345","DOIUrl":"10.1016/j.eqrea.2024.100345","url":null,"abstract":"<div><div>The travel-time corrections for the primary seismic phases of 72 stations in the Guangdong seismic network, relative to the 1D South China travel-time model, were determined using joint hypocentral determination (JHD) and statistical analysis methods. The travel-time corrections for the Pg phase of 72 stations range between −0.25 s and 0.14 s, while the corrections for the Sg phase range between 0.27 s and 0.35 s, and those for the Pn phase are between −0.86 s and 0.07 s. The spatial distribution of travel-time corrections for Pg, Sg, and Pn phases of 72 stations correlates well with the geological structure in this region. This indicates that the travel-time corrections for Pg and Sg phases are mainly caused by the discrepancy between the actual crustal velocity structure beneath the stations and the 1D South China travel-time model. These corrections empirically compensate for systematic travel-time errors arising from such discrepancies. The primary factor contributing to the travel-time corrections for the Pn phase is the Moho undulations or tilt. These corrections are intended to compensate for systematic errors in travel time caused by variations in the actual Moho. By integrating the obtained travel-time corrections into the HYPO-SAT location algorithm, test results showed an obvious improvement in location accuracy and origin time precision for explosion events. The variation of horizontal distance between repeating earthquake pairs has also improved, with 86% of the repeating earthquake pair spacing being more accurately estimated after correction. This suggests the crucial significance of travel-time correction in earthquake location, and the consideration of travel-time correction exerts a notable impact on enhancing earthquake location accuracy.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100345"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Green anchors enhance slope stability: mechanisms and efficacy in reinforcement 绿色锚杆增强边坡稳定性：加固机制和效果

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100372

Zhihao Du , Yu Zhang , Haifeng Huo , Sheng Shi , Ruidong Li , Bingbing Han

引用次数: 0

Disaster analysis and lessons learned from the July 22, 2024, Ethiopian landslide 灾害分析和从2024年7月22日埃塞俄比亚滑坡中吸取的教训

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100358

Tao Li , Junxue Ma , Yuandong Huang , Shuhui Zhang , Huiran Gao , Chong Xu

{"title":"Disaster analysis and lessons learned from the July 22, 2024, Ethiopian landslide","authors":"Tao Li , Junxue Ma , Yuandong Huang , Shuhui Zhang , Huiran Gao , Chong Xu","doi":"10.1016/j.eqrea.2025.100358","DOIUrl":"10.1016/j.eqrea.2025.100358","url":null,"abstract":"<div><div>Rainfall-induced landslides are often highly destructive. Reviewing and analyzing the causes, processes, impacts, and deficiencies in emergency response is critical for improving disaster prevention and management. From the night of July 21 to the morning of July 22, 2024, the Kencho Shacha Gozdi Village in Gezei Gofa, Southern Nations, Nationalities, and Peoples' Region, Ethiopia, suffered heavy rainfall that triggered two landslides. By July 25, this event had claimed at least 257 lives. This study presents a detailed characterization of the landslides using multi-source data. By analyzing the landslide disaster process, this study summarizes key lessons and provides suggestions for preventing rainfall-induced geological hazards. The results indicate that rainfall has the greatest impact on the occurrence of landslides, while lithology and human activities have promoted and strengthened the landslide disaster. Despite the active disaster response in the local area, many problems were still exposed in the emergency response work. This analysis offers valuable insights for mitigating rainfall-induced geological hazards and enhancing emergency response capabilities.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100358"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Seismic response of existing stone masonry structures on soft soil foundations 软土地基上既有石砌体结构的地震反应

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100370

Xin Zhao , Haojiang Shang , Yingxiong Wu

{"title":"Seismic response of existing stone masonry structures on soft soil foundations","authors":"Xin Zhao , Haojiang Shang , Yingxiong Wu","doi":"10.1016/j.eqrea.2025.100370","DOIUrl":"10.1016/j.eqrea.2025.100370","url":null,"abstract":"<div><div>The coastal region of Fujian contains numerous existing stone masonry structures, many of which are constructed on soft soil sites. Previous studies have shown that the soil-structure interaction (SSI) effect on soft soil foundations can prolong the structure's natural vibration period and enhance its seismic response. We develops a soil-structure interaction system model and a comparative rigid foundation model using the finite element software LS-DYNA to investigate the impact of SSI on the dynamic characteristics and seismic response of stone structures. The results indicate that the SSI effect alters stone structures' dynamic properties and seismic response. This alteration is evident in the extended natural vibration period, which reduces overall stiffness, increases interstory displacement angles, and slightly decreases the acceleration response. Under both SSI and FIX systems, the structural failure mode is characterized by the external collapse of the second-story stone walls, which causes the roof stone slabs to lose support and fall, leading to overall collapse. The FIX system demonstrates better structural integrity and stability with slower crack development. In contrast, the SSI system exhibits cracks that appear earlier and develop more rapidly, causing more severe damage. The research findings provide a theoretical basis for the seismic reinforcement of existing stone structures on soft soil foundations.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100370"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary analysis of emergency production and source parameters of the M 4.7 earthquake on September 18, 2024 in Feidong, Anhui 2024年9月18日安徽肥东4.7级地震应急生成及震源参数初步分析

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100360

Jiajing Xu, Guangjie Han, Nan Xi, Li Sun

{"title":"Preliminary analysis of emergency production and source parameters of the M 4.7 earthquake on September 18, 2024 in Feidong, Anhui","authors":"Jiajing Xu, Guangjie Han, Nan Xi, Li Sun","doi":"10.1016/j.eqrea.2025.100360","DOIUrl":"10.1016/j.eqrea.2025.100360","url":null,"abstract":"<div><div>At 20:08 on September 18, 2024, Beijing time, an earthquake of magnitude 4.7 occurred in Feidong, Anhui Province (31.98°N, 117.6°E). The China Earthquake Early Warning Network presented the first early warning results 8.9 s after the earthquake. The China Earthquake Networks Center (CENC) released the automatic rapid report results 163 s after the earthquake and the official rapid report results 8 min after the earthquake. At the same time, the CENC reported a series of emergency products, including source parameters, seismic tectonics, historical earthquakes, focal mechanism, instrument seismic intensity and predicted intensity. The results showed that the earthquake was located at the junction of the southern section of the Tanlu Fault and the Feizhong Fault, with aftershocks distributed in the NEE direction. The focal mechanism solution indicates that the earthquake is essentially a strike-slip event. The predicted intensity in the vicinity of the epicenter reaches up to VI, involving 23 towns that cover an area of about 1 359 km<sup>2</sup>. Only one station near the epicenter shows a peak acceleration value greater than the fortification standard of the area, which may cause slight damage to some adjacent houses, consistent with the actual damage to buildings.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100360"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144906886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Deriving focal mechanism solutions of small to moderate earthquakes in Sichuan, China via a deep learning method 基于深度学习方法的四川中小地震震源机制解

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100371

Chen Zhang , Ji Zhang , Jie Zhang

{"title":"Deriving focal mechanism solutions of small to moderate earthquakes in Sichuan, China via a deep learning method","authors":"Chen Zhang , Ji Zhang , Jie Zhang","doi":"10.1016/j.eqrea.2025.100371","DOIUrl":"10.1016/j.eqrea.2025.100371","url":null,"abstract":"<div><div>As one of the most seismically active regions, Sichuan basin is a key area of seismological studies in China. This study applies a neural network model with attention mechanisms, simultaneously picking the P-wave arrival times and determining the first-motion polarity. The polarity information is subsequently used to derive source focal mechanisms. The model is trained and tested using small to moderate earthquake data from June to December 2019 in Sichuan. We apply the trained model to predict first-motion polarity directions of earthquake recordings in Sichuan from January to May 2019, and then derive focal mechanism solutions using HASH algorithm with predicted results. Compared with the source mechanism solutions obtained by manual processing, the deep learning method picks more polarities from smaller events, resulting in more focal mechanism solutions. The catalog documents focal mechanism solutions of 22 events (<em>M</em><sub>L</sub> 2.6–4.8) from analysts during this period, whereas we obtain focal mechanism solutions of 53 events (<em>M</em><sub>L</sub> 1.9–4.8) through the deep learning method. The derived focal mechanism solutions for the same events are consistent with the manual solutions. This method provides an efficient way for the source mechanism inversion of small to moderate earthquakes in Sichuan region, with high stability and reliability.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100371"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crustal velocity structure and composition of Bayan Har block and surrounding areas 巴颜喀尔地块及其周缘地壳速度结构与组成

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100389

Jiyan Lin , Tao Xu , Zhenyu Fan , Yong Qiu , Minjie Chen , Yonghong Duan

{"title":"Crustal velocity structure and composition of Bayan Har block and surrounding areas","authors":"Jiyan Lin , Tao Xu , Zhenyu Fan , Yong Qiu , Minjie Chen , Yonghong Duan","doi":"10.1016/j.eqrea.2025.100389","DOIUrl":"10.1016/j.eqrea.2025.100389","url":null,"abstract":"<div><div>The Bayan Har block, one of China's most seismically active regions, has experienced multiple major earthquakes (≥<em>M</em> 7.0) in recent years. It is a key area for investigating the interactions between the Qinghai-Xizang (Qingzang) Plateau and adjacent blocks, plateau uplift, and strong earthquake mechanisms. P-wave velocity and crustal composition provide key constraints on the properties of distinct tectonic units and their evolutionary modification processes. Based on the results of 8 Deep Seismic Sounding (DSS) profiles completed in the Bayan Har block and surrounding areas over the past 20 years, We constructed one-dimensional P-wave velocity models for the crust of Bayan Har block, Qilian fold belt, Qinling fold belt, Alxa block, Ordos block and Sichuan basin. Furthermore, crustal composition models for different tectonic units were established based on these results. The results reveal that the crustal thickness of the Bayan Har block gradually decreases towards the NNE, NE, and SE directions, while the average crustal velocity increases correspondingly. The felsic layer in the crust accounts for more than half of the total crustal thickness. The mafic content within the crust of different tectonic units exhibits notable variations, which may reflect that the Bayan Har block, Qilian fold belt, and Qinling fold belt have experienced more intensive lithospheric evolution processes compared to Ordos basin and Sichuan basin. The seismicity distribution in this region is significantly controlled by crustal velocity and composition heterogeneity across the Bayan Har block and adjacent areas, which demonstrates that earthquakes within and around the Bayan Har block exhibit both high frequency and larger magnitudes. These seismic characteristics primarily result from intense crustal stress accumulation and release during the outward expansion of the Qingzang Plateau.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100389"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of far-field mega earthquake on cascade hydropower along the Yalongjiang river by simulating the 1850 Xichang M 7.5 earthquake 模拟1850年西昌7.5级地震对雅砻江流域级联水力发电的影响

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2025.100373

Su Chen , Yiming He , Xiaojun Li , Lei Fu

{"title":"Influence of far-field mega earthquake on cascade hydropower along the Yalongjiang river by simulating the 1850 Xichang M 7.5 earthquake","authors":"Su Chen , Yiming He , Xiaojun Li , Lei Fu","doi":"10.1016/j.eqrea.2025.100373","DOIUrl":"10.1016/j.eqrea.2025.100373","url":null,"abstract":"<div><div>Researching and comprehending the characteristics of destructive seismic motions is essential for the seismic design of critical infrastructure. This study employs historical data from the <em>M</em> 7.5 earthquake that occurred in 1850 to simulate the impacts of a <em>M</em> 7.5 event on hydropower stations located in proximity to Xichang. Key factors taken into account in the simulation of seismic motion encompass uncertainties, mixed-source models, and the placement of asperities. Through these simulations, we acquired the peak ground acceleration (PGA), acceleration time histories, and acceleration response spectra for the hydropower facilities affected by the earthquake. To perform a comprehensive analysis, we utilized a multi-scenario stochastic finite fault simulation method to estimate parameters including the minimum, average, and maximum values of PGA and pseudo-spectral acceleration (PSA) response spectra. Additionally, we assessed the 50<sup>th</sup>, 84<sup>th</sup>, and 95<sup>th</sup> percentiles values of the peak ground acceleration and pseudo-spectral acceleration response spectra. The simulation results also include peak ground acceleration field maps and peak ground velocity (PGV) field maps and intensity distribution maps pertaining to the earthquake. The findings demonstrate that the intensity maps produced through the stochastic finite fault method closely correspond with the intensity contour maps published of historical seismic records. These findings offer significant insights for the seismic safety evaluation and design of the specified hydropower stations. Moreover, this multi-scenario methodology can be effectively utilized for other critical infrastructure projects to derive dependable seismic motion parameters.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100373"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancements in remote sensing techniques for earthquake engineering: A review 地震工程遥感技术进展综述

Earthquake Research Advances Pub Date : 2025-07-01 DOI: 10.1016/j.eqrea.2024.100352

Chinmayi H.K , K. Colton Flynn , Amanda J. Ashworth

{"title":"Advancements in remote sensing techniques for earthquake engineering: A review","authors":"Chinmayi H.K , K. Colton Flynn , Amanda J. Ashworth","doi":"10.1016/j.eqrea.2024.100352","DOIUrl":"10.1016/j.eqrea.2024.100352","url":null,"abstract":"<div><div>Remote sensing technologies play a vital role in our understanding of earthquakes and their impact on the Earth's surface. These technologies, including satellite imagery, aerial surveys, and advanced sensors, contribute significantly to our understanding of the complex nature of earthquakes. This review highlights the advancements in the integration of remote sensing technologies into earthquake studies. The combined use of satellite imagery and aerial photography in conjunction with geographic information systems (GIS) has been instrumental in showcasing the significance of fusing various types of satеllitе data sourcеs for comprеhеnsivе еarthquakе damagе assеssmеnts. However, remote sensing encounters challenges due to limited pre-event imagery and restricted post-earthquake site access. Furthеrmorе, thе application of dееp-lеarning mеthods in assеssing еarthquakе-damagеd buildings dеmonstratеs potеntial for furthеr progrеss in this fiеld. Overall, the utilization of remote sensing technologies has greatly enhanced our comprehension of earthquakes and their effects on the Earth's surface. The fusion of remote sensing technology with advanced data analysis methods holds tremendous potential for driving progress in earthquake studies and damage assessment.</div></div>","PeriodicalId":100384,"journal":{"name":"Earthquake Research Advances","volume":"5 3","pages":"Article 100352"},"PeriodicalIF":0.0,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0