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地震研究进展（英文）
中国地震局
地震研究进展（英文）

中国地震局

季刊

2096-9996

erc19871@hotmmail.com

010-68530337

100045

北京西城三里河路56号

地震研究进展（英文）/Journal Earthquake Research AdvancesCSCD北大核心
查看更多>>《中国地震研究（英文版）》（Earthquake Research in China）（季刊）创刊于1987年，是由中国地震台网中心主办的综合性英文版学术刊物。内容主要为历史地震研究、地震预报、前兆研究、地震工程与工程振动、地震学、试验地震学、观测技术、地震仪器、中国地震工作的指导方针和政策、地震社会学和地震工作对策等。
正式出版
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    The 2024 Mj 7.6 Noto Peninsula,Japan earthquake caused by the fluid flow in the crust

    Yuzo IshikawaLing Bai
    1-6页
    查看更多>>摘要：On January 1,2024 at 16∶10∶09 JST,an Mj 7.6 earthquake struck the Noto Peninsula in the southern part of the Sea of Japan.This location has been experiencing an earthquake swarm for more than three years.Here,we provide an overview of this earthquake,focusing on the slip distribution of the mainshock and its relationship with the preceding swarm.We also reexamined the source areas of other large earthquakes that occurred around the Sea of Japan in the past and compared them with the Matsushiro earthquake swarm in central Japan from 1964 to 1968.The difference between the Matsushiro earthquake swarm and the Noto earthquake swarm is the surrounding stress field.The Matsushiro earthquake swarm was a strike-slip stress field,so the cracks in the crust were oriented vertically.This allowed fluids seeped from the depths to rise and flow out to the surface.On the other hand,the Noto area was a reverse fault stress field.Therefore,the cracks in the earth's crust were oriented horizontally.Fluids flowing underground in deep areas could not rise and spread over a wide area in the hori-zontal plane.This may have caused a large amount of fluid to accumulate underground,triggering a large earthquake.Although our proposed mechanism does not take into account other complex geological conditions into consideration,it may provide a simple way to explain why the Noto swarm is followed by a large earthquake while other swarms are not.
      原文链接:
    • 万方数据

    The seismicity in the middle section of the Altyn Tagh Fault system revealed by a dense nodal seismic array

    Shi YaoTao XuYingquan SangLingling Ye...
    7-15页
    查看更多>>摘要：The left-lateral Altyn Tagh Fault(ATF)system is the northern boundary of the Qinghai-Xizang Plateau,separating the Tarim Basin and the Qaidam Basin.The middle section of ATF has not recorded any large earthquakes since 1598 AD,so the potential seismic hazard is unclear.We develope an earthquake catalog using continuous waveform data recorded by the Tarim-Altyn-Qaidam dense nodal seismic array from September 17 to November 23,2021 in the middle section of ATF.With the machine learning-based picker,phase association,location,match and locate workflow,we detecte 233 earthquakes with ML-1-3,far more than 6 earthquakes in the routine catalog.Combining with focal mechanism solutions and the local fault structure,we find that seismic events are clustered along the ATF with strike-slip focal mechanisms and on the southern secondary faults with thrusting focal mechanisms.This overall seismic activity in the middle section of the ATF might be due to the northeast-ward transpressional motion of the Qinghai-Xizang Plateau block at the western margin of the Qaidam Basin.
      原文链接:
    • 万方数据
    • 维普

    Interseismic slip distribution and locking characteristics of the mid-southern segment of the Tanlu fault zone

    Shuyuan YuLayue LiJiaji LuoYuanyuan Yang...
    16-26页
    查看更多>>摘要：We employ the block negative dislocation model to invert the distribution of fault coupling and slip rate deficit on the different segments of the Tanlu(Tancheng-Lujiang)fault zone,according to the GPS horizontal velocity field from 1991 to 2007(the first phase)and 2013 to 2018(the second phase).By comparing the deformation characteristics results,we discuss the relationship between the deformation characteristics with the M earthquake in Japan.The results showed that the fault coupling rate of the northern section of Tancheng in the second phase reduced compared with that in the first phase.However,the results of the two phases showed that the northern section of Juxian still has a high coupling rate,a deep blocking depth,and a dextral compressive deficit,which is the enrapture section of the 1668 Tancheng earthquake.At the same time,the area strain results show that the strain rate of the central and eastern regions of the second phase is obviously enhanced compared with that of the first phase.The occurrence of the great earthquake in Japan has played a specific role in alleviating the strain accumulation in the middle and south sections of the Tanlu fault zone.The results of the maximum shear strain show that the shear strain in the middle section of the Tanlu fault zone in the second phase is weaker than that in the first phase,and the maximum shear strain in the southern section is stronger than that in the first phase.The fault coupling coefficient of the south Sihong to Jiashan section is high,and it is also the unruptured section of historical earthquakes.At the same time,small earthquakes in this area are not active and accumulate stress easily,so the future earthquake risk deserves attention.
      原文链接:
    • 万方数据
    • 维普

    3D near-surface P-wave velocity structure imaging with Distributed Acoustic Sensing and electric hammer source

    Heting HongFu YinYuhang LeiYulan Li...
    27-33页
    查看更多>>摘要：Distributed Acoustic Sensing(DAS)is an emerging technique for ultra-dense seismic observation,which provides a new method for high-resolution sub-surface seismic imaging.Recently a large number of linear DAS arrays have been used for two-dimensional S-wave near-surface imaging in urban areas.In order to explore the feasibility of three-dimensional(3D)structure imaging using a DAS array,we carried out an active source experiment at the Beijing National Earth Observatory.We deployed a 1 km optical cable in a rectangular shape,and the optical cable was recast into 250 sensors with a channel spacing of 4 m.The DAS array clearly recorded the P,S and surface waves generated by a hammer source.The first-arrival P wave travel times were first picked with a Short-Term Average/Long-Term Average(STA/LTA)method and further manually checked.The P-wave signals recorded by the DAS are consistent with those recorded by the horizontal components of short-period seis-mometers.At shorter source-receiver distances,the picked P-wave arrivals from the DAS recording are consistent with vertical component recordings of seismometers,but they clearly lag behind the latter at greater distances.This is likely due to a combination of the signal-to-noise ratio and the polarization of the incoming wave.Then,we used the TomoDD software to invert the 3D P-wave velocity structure for the uppermost 50 m with a reso-lution of 10 m.The inverted P-wave velocity structures agree well with the S-wave velocity structure previously obtained through ambient noise tomography.Our study indicates the feasibility of 3D near-surface imaging with the active source and DAS array.However,the inverted absolute velocity values at large depths may be biased due to potential time shifts between the DAS recording and seismometer at large source-receiver distances.
      原文链接:
    • 万方数据
    • 维普

    Application of oblique photogrammetry technique in geological hazard identification and decision management

    Min TangXi MeiYanna LiChen Chen...
    34-41页
    查看更多>>摘要：With the continuous development of the oblique photography technique,it has been used more and more widely in the field of geological disasters.It can quickly obtain the three-dimensional(3D)real scene model of dangerous mountainous areas under the premise of ensuring the safety of personnel while restoring the real geographic information as much as possible.However,geological disaster areas are often accompanied by many adverse factors such as cliffs and dense vegetation.Based on this,the paper introduced the flight line design of oblique photogrammetry,analyzed the multi-platform data fusion processing,studied the multi-period data dynamic evaluation technology and proposed the application methods of data acquisition,early warning,disaster assessment and decision management suitable for geological disaster identification through the analysis of actual cases,which will help geologists to plan and control geological work more scientifically and rationally,improve work efficiency and reduce the potential personnel safety hazards in the process of geological survey,to offer technical support to the application of oblique photogrammetry in geological disaster identification and decision making and provide the scientific basis for personal and property safety protection and later-stage geological disaster management in disaster areas.
      原文链接:
    • 万方数据
    • 维普

    Identification and hazard analysis of landslides triggered by earthquakes and rainfall

    Lei LiYu ZhangYunlong HouBingbing Han...
    42-54页
    查看更多>>摘要：This study aims to utilize the Small Baseline Subset Interferometric Synthetic Aperture Radar(SBAS-InSAR)technique and Google Earth optical remote sensing images to analyze the area within 20 km around the epicenter of a M 3.9,earthquake that occurred in Tanchang County,Gansu Province,on December 28,2020.The objective is to identify potential earthquake-induced landslides,assess their scale,and determine their impact range.The study results reveal the successful identification of two potential landslides in the 20 km radius around the epicenter.Through time-series deformation analysis,it was observed that these potential landslides were significantly influenced by both the earthquake and rainfall.Further estimation of these potential landslides in-dicates maximum depths of 7.4 m and 14.1 m for the failure surfaces,with volumes of 9.02 × 104 m3 and 25.5 × 104 m3,respectively.Finally,based on the simulation analysis of Massflow software,the maximum thickness of soil accumulation in the final accumulation area after sliding of the potential landslide in Shangyaai is 12 m,the area of the final accumulation area is 1.75 × 104 m2,and the farthest movement distance is 1124 m.The maximum thickness of soil accumulation in the final accumulation area after sliding of the potential landslide in Wangshancun is 8 m,the area of the final accumulation area is 7.89 × 104 m2,and the farthest movement dis-tance is 742 m.
      原文链接:
    • 万方数据
    • 维普

    Spatial distribution characteristics and influence factor analysis of landslides——case study of the Hanwang area in Qinba Mountains

    Jikai ZhangYanbo CaoWen FanWenbo Zheng...
    55-65页
    查看更多>>摘要：The geological hazards of landslides in Hanwang Town,Ziyang County,Ankang City,Shaanxi Province,have emerged.Yet,the current understanding of the spatial distribution characteristics and influencing factors of landslides in this area remains unclear.Combining the results of remote sensing interpretation and field inves-tigation,seven influencing factors,namely,elevation,slope direction,slope gradient,distance from rivers,dis-tance from faults,engineering geologic lithology,and distance from roads,are selected for the study.The distribution characteristics of landslides in each influencing factor and the influence of the resolution of the Digital Elevation Model(DEM)on the results are statistically and analytically analyzed.Furthermore,two high-risk landslides within the study area were subjected to comprehensive analysis,integrating the findings from drilling and other field investigations in order to examine their deformation mechanisms.Based on this analysis,the following conclusions were derived:(1)34 landslides in the study area,mainly small earth landslides,with a distribution density of 0.42/km2,threatening 414 people and property of about 55.87 million Yuan.(2)The landslides in the study area easily occur in the＜400 m elevation range;the landslides are developed in all slope directions,the gradient is mainly concentrated in the range of 10°-40°,the distribution density of the landslides is higher in the closer distance from the river and the faults(0-200 m),the landslide-prone strata are mainly the softer and weaker metamorphic rocks,and the landslides are mainly around roads.(3)The resolution of the DEM should be selected based on the specific conditions of the study area,the requirements of the investigation,and the scale of the landslide.Opting for an appropriate DEM resolution is advantageous for understanding the patterns of landslides and conducting risk assessments in the region.(4)The Zhengjiabian landslide is a traction Landslide.The landslide body is a binary structure of gravel soil and slate weathering layer,and the damage process can be divided into three stages:①damage to the leading edge and stress release,②continuous creep and cracking,③rainfall infiltration and damage.The predominant slope material in the Brickyard landslide comprises clay,and the landslide is triggered by a combination of the traction effect resulting from the excavation at the slope's base and the nudging effect caused by the stacking load of the brick factory.Additionally,the Brickyard landslide exhibits persistent creep deformation.The study results provide a scientific basis for disaster prevention and mitigation in the Hanwang Township area.
      原文链接:
    • 万方数据

    The effect of seismic action on stability of saline soil subgrade in cold region based on isothermal stratification method

    Jie ChengYu ZhangYing MaXuerui Chen...
    66-81页
    查看更多>>摘要：With the change of seasons,the shear strength of saline soil subgrade filler will change with the change of external temperature,which will aggravate the adverse effects of seismic on the subgrade.To explore the influence of seismic action on the stability of saline soil subgrade under the influence of temperature on the strength of saline soil subgrade filler,this paper first carried out saline soil shear tests at different temperatures to obtain the in-fluence of temperature on the shear strength of saline soil.Then,the temperature field of the saline soil subgrade was simulated,and then based on the subgrade isothermal stratification model and FLAC3D,the displacement and acceleration amplification effects of seismic action on the shady slope,sunny slope and subgrade of saline soil subgrade in different months were analyzed.The following conclusions were finally drawn:under the action of seismic,In the process of the change of subgrade temperature of Qarhan-Golmud Expressway between-7.7 ℃ and 27 ℃,the change of saline soil cohesion is the main factor affecting the stability of subgrade slope,and the maximum and minimum values of subgrade surface settlement appear in September and June of each year,respectively.In August,the differences of settlement between the shady slope and the sunny slope shoulder of the subgrade were the largest,and the acceleration of the shady slope and the sunny slope and the inside of the subgrade changed most significantly in the vertical direction.Special attention should be paid to the seismic early warning in the above key months;In the range from both sides of the shoulder to the centerline of the roadbed,the acceleration amplification effect starts to increase significantly from about 3m from the centerline of the roadbed to the centerline,so it is necessary to pay attention to the seismic design of this range.
      原文链接:
    • 万方数据
    • 维普

    Major methods of seismic anisotropy

    Xinai ZhaoJing Wu
    82-91页
    查看更多>>摘要：Seismic anisotropy reveals that seismic wave velocity,amplitude,and other physical properties show variations in different directions,which can be divided into lattice-preferred orientation(LPO)and shape-preferred orientation(SPO)according to its physical mechanisms.The main methods for studying seismic anisotropy include shear-wave splitting analysis,P-wave travel time inversion and surface-wave tomography,etc.There are some differ-ences and correlations among these methods.Seismic anisotropy is an important way to reveal the dynamic processes of crust-mantle evolution,and it is significant for monitoring crustal stress changes and improve seismic exploration studies.With the help of long-term observation,the application of machine learning techniques and combining inversion based on multiple phases would become potential developments in seismic anisotropy studies.This may improve the understanding of complex seismic anisotropic models,such as multiple layers anisotropy with an oblique axis of symmetry.
      原文链接:
    • 万方数据
    • 维普

    GUIDE FOR AUTHORS

    95-101页
      原文链接:
    • 万方数据
    • 维普