The Quaternary chronostratigraphic framework serves as a fundamental basis for evaluating the active parameters of Neotectonic movements and fault activity. However, the scarcity of the continuous stratigraphic sections and the lack of absolute age calibration have led to diverse interpretations regarding the Quaternary stratigraphic divisions in the Beijing Plain, particularly concerning the classification of the thick gravel layer at depth. These discrepancies significantly affect the delineation of boundaries between the Upper Pliocene and Lower Pleistocene, as well as the determination of the timing of the latest Quaternary tectonic event. Consequently, the development of reliable seismo-tectonic models and the quantitative assessment of seismic hazards in the North China Plain remain constrained. In this study, we analyzed a 603-m-long continuous stratigraphic core obtained from borehole XD04, drilled in the Dachang Sag located in the eastern Beijing Plain. By conducting systematic paleomagnetic analyses and dating key stratigraphic horizons using optically stimulated luminescence (OSL) and cosmogenic nuclide techniques, we established a detailed Quaternary chronostratigraphic framework for the Dachang Sag. The base of the Holocene Yanjiao Formation () is Qyj h identified at a depth of 4.8 m, while the base of the Upper Pleistocene Junying Formation () occurs at 76.4 Q3jY p m. The lower boundary of the Middle Pleistocene Zhaili Formation () corresponds to the Brunhes-Q2zl p Matuyama (B/M) magnetostratigraphic boundary or a parallel unconformity with its underlying strata at a depth of 229.9 m. Furthermore, the base of the Lower Pleistocene Xiadian Formation () aligns with the Q1xd p Matuyama-Gauss (M/G) magnetostratigraphic boundary at a depth of 412.8 m. Strata below the M/G boundary are assigned to the Pliocene Shunyi Formation (). Notably, the fine-grained sediments between depths of Nsy 2 39.14 m and 229.85 m represent lacustrine deposits filled within the Dachang paleo-lake during the Middle to early Late Pleistocene. OSL dating results indicate that the paleo-lake disappeared between 41.5 +/- 1.7 ka and 58.4 +/- 2.6 ka ago, likely due to the interplay between the eastward extrusion of the Qinghai-Tibetan Plateau and the westward subduction of the Pacific Plate during the Late Quaternary. Additionally, the parallel unconformity between the Middle Pleistocene Zhaili Formation () and the Lower Pleistocene Xiadian Formation () Q2zlQ1xd pp provides geological evidence for Neotectonic activity. Finally, a thick gravel layer occurring between depths of 512.6 and 591.4 m is attributed to the Pliocene Shunyi Formation (), representing the sedimentary deposits Nsy 2 associated with the differential uplift and formation of the Tangxian paleo-planation surface. This uplift was driven by the intense extrusion of the Qinghai-Tibetan Plateau during the mid-to-late Pliocene. Therefore, the presence of this deep gravel layer reflects the far-field tectonic effects of the eastward movement of the Plateau.

Active faults serve as potential sources of destructive earthquakes. Studies and investigations of active faults are necessary for earthquake disaster prevention. This study presents a nation-scale database of active faults in China and its adjacent regions, in tandem with an associated web-based query system. This database is an updated version of the active faults data included in the Seismotectonic Map of China and its Adjacent Regions (1:4 000 000), which is one of the four essential maps of the mandatory Chinese standard GB 18306-2015 Seismic Ground Motion Parameter Zonation Maps of China. The data update and integration stem from regional-scale studies and surveys conducted over the past 2 decades (at reference scales from 1:250 000 to 1:50 000). The information amassed from these regional-scale studies and surveys encompasses geophysical probing, drill logging, measurement of offset landforms, sample dating, as well as geometric and kinematic parameters of exposed and blind faults, paleo-earthquake sequences, and recurrence intervals. These data have been acquired and analyzed utilizing a uniform technical standard framework and reviewed by expert panels in both field and laboratory settings. Our system hosts this nation-scale database accessible through a Web Geographic Information System (GIS) application, enabling browsing, querying, and downloading functionalities via a web browser. The system we built also publishes the Open Geospatial Consortium (OGC) Web Feature Service and the OGC Web Map Service of active faults data. Users can incorporate map layers and obtain fault data in OGC-compliant GIS software for further analysis through these services. The Chinese government, research institutions, and companies have widely used the active faults data from the previous versions of the database. The database is available at https://doi.org/10.12031/activefault.china.400.2023.db (Xu, 2023) and via the web system (https://data.activetectonics.cn/arcportal/apps/webappviewer/index.html?id=684737e8849c4170bbca14447608c451, CEFIS, 2023; http://data.activetectonics.cn/arcserver/services/Hosted/CAFD400_2022_WFS/MapServer/WFSServer, CAFD WFS, 2024).

The typical earthquake hazards chain includes main shock, surface ruptures, aftershocks, and earthquake-induced landslides, leading to structural damage and casualties. Lots of investigation and research were published. But there is no Web-GIS platform to integrate earthquake hazards chain data and compare relative research results. This paper studies compiling such a hazards chain database and building a cloud-based Web-GIS system of the 2008 earthquake. The system introduced by this paper provides buttons and tools to browse, query and analyze map data. In addition, this system is open to anyone to add data for viewing and comparing in the web map. The result showcases that the cloud-based system runs efficiently and flexibly. The multi-scale and multi-source data can be integrated into a "one-map" system by well-design map services and geodatabase.

Earthquake emergency response maps represent a set of geographical maps related to the seismic activity, geological tectonic background, assessment of economy and population losses, secondary disaster probability, as well as other information for emergency response and rescue. It requires producing these kinds of maps as quickly as possible after an earthquake. The seismotectonic map is one of the most important maps for earthquake emergency response. In this study, we developed an earthquake emergency response system to produce the map automatically. This paper introduces a intelligent system framework using spatial analysis, version management and web communication technology for emergency response, data maintenance, remote map revision, version management and statistics, which is not discussed in previous studies. The system based on MySQL, ArcGIS platform, python, and curl. It can detect the earthquake fast report proactive. When capturing the official report, it activated the response function module. The system achieved the first version mapping, fault data pushing, and earthquake catalogue updating by data-driven method automatically and rapidly. The mapping process can be divided into map layout and expert knowledge. The expert knowledge part can be divided into a geography map and explanatory note. The system performed well on the map layout and geography map. The explanatory note in the map, which introduces regional tectonics and expert knowledge, can provide the nearest fault's name, active age, and feature in the first version. Experts need to produce the second version manually. The fault data of 5°×5°area centred on the main shock is clipped and sent to a specified mailbox. The system added the earthquake parameters to the database. The result shows that this system finished these work well automatically and reduce the responds time and data maintenance time. If the earthquake causes serious calamity, seismogeology experts need to collect, summarize and analyse literature, document, and other information for successor versions and even predicting aftershock and disaster. It is practically needed to build a more intelligent and efficient system to produce a successor version of the map and push more knowledge in the future. The challenge in the future is to develop a more intelligent system to self-explain the seismotectonic map and push expert knowledge. This goal can only be achieved by processing expert knowledge data like regional lithology, tectonic structure, paleo earthquake, and historical earthquake in the database layer, data access layer, and business logic layer of the system.

测量地表的断层位移对于恢复同震位移和长期累积位移分布非常重要.近年来,编程软件的不断更新和高精度地形数据(例如激光雷达探测与测量和无人机航空摄影测量)的积累为测量密集的断层位移数据提供了前所未有的机会.文中主要对2款比较常用的断层位移测量软件——LaDiCaoz和3D_Fault_Offsets进行介绍.首先,基于阿尔金断层东段石包城铁矿附近的1个位移测量实例分别说明这2款软件的工作原理;然后,分别对比和总结了其在目标地貌标志、界面、输入文件类型、自动化程度、适应性、可重复性和输出文件类型等方面的差异和优劣;最后,基于2种软件在阿尔金断裂东段获得的2组断层位移数据的相关性研究,探讨2种软件的结果是否相互验证,以及线性地貌标志的弯曲程度对测量结果的影响.通过对2种软件所得测量结果与野外地质测量结果的对比,以及对软件测量结果的可靠性和地质意义的讨论,我们认为目前这2款软件都存在自动化程度较低和人为因素影响较大等不足之处,高度自动化和人工智能的引入可能是断层位移测量方法的发展方向.

The seismic cycle model is roughly constrained by limited offset data sets from the eastern Altyn Tagh fault with a low slip rate. The recent availability of high-resolution topographic data from the eastern Altyn Tagh fault provides an opportunity to obtain distinctly improved quantitative, dense measurements of fault offsets. In this paper, we used airborne light detection and ranging data and unmanned aircraft vehicle photogrammetry to evaluate fault offsets. To better constrain the large earthquake recurrence model, we acquired dense data sets of fault displacements using the LaDiCaoz_v2.1 software. A total of 321 offset measurements below 30 m highlight two new observations: (1) surface-slip of the most recent earthquake and multiple events exhibit both short-wavelength (m-scale) and long-wavelength (km-scale) variability; and (2) synthesis of offset frequency analysis and coefficient of variation indicate regular slip events with ∼6 m slip increment on fault segments to the west of the Shulehe triple junction. The distribution of offsets and paleoseismological data reveal that the eastern Altyn Tagh fault exhibits characteristic slip behavior, with the characteristic slip of ∼6 m and a recurrence period ranging from 1170 to 3790 years. Paleoearthquake recurrence intervals and slip increments yield mean horizontal slip-rate estimates of 2.1–2.6 mm/yr for fault segments to the west of the Shulehe triple junction. Assuming a 10 km rupture depth and a 30 GPa shear modulus, we estimated a characteristic slip event moment magnitude (Mw) of ∼7.6. Finally, we discuss the interaction mechanism between Altyn Tagh fault (strike fault) and the NW-trending thrust faults (reverse faults) that caused the sudden decrease of sinistral slip rate at the Shulehe and Subei triple junctions; our results support the eastward “lateral slip extrusion” model.

GPS observations across active mountain ranges provide essential constraints on uplift rates, which sheds light on the underlying physical processes contributing to the development of topography. The Kunlun Shan (KLS) mountain range bounds the topographic high of the northern Tibetan Plateau. The elevation across the range sharply decreases from >4000 m in the interior of the plateau to ~2700 m in the Qaidam Basin. The mechanism responsible for its formation is debated with several models proposed on the basis of seismological and geological data. Here we consider data constraints from a cGPS profile that runs across the KLS and was installed in 2007. Our GPS time series reveal direct mechanical response to the crustal thickening across the KLS and therefore provide a promising dataset against which some geodynamical models can be tested. Based on the GPS time series, we estimate rates of tectonic uplift and evaluate the impacts originating from reference frame drifts, common mode errors, some non-tectonic signals (e.g., hydrological loading), time-correlated noise, and postseismic transients of recent large earthquake. The GPS-derived uplift rate is ~1 mm/yr at the KLS. We find that ~2 mm/yr deep slip on a low- or intermediate-angle south-dipping thrust fault can explain the GPS-derived uplift rate. The possibility of a high-angle thrust fault, as has been proposed for the Longmen Shan (southeastern Tibetan Plateau), does not appear to be likely in the KLS case.

When the strong earthquake occurs, the deformation response and rupture of the overlying soil are very complicated. In this paper, the influence of fault dip angle on the surface deformation and rupture of overlying soil is analyzed by means of finite element numerical simulation. When the vertical dislocation of the fault is about 3∼5% of the thickness of the overlying soil layer, the surface rupture occurs only when the fault dip angle is 45°. When the vertical displacement of the fault increases to 10% of the thickness of the overlying soil layer, surface rupture occurs under three working conditions of 45°, 70° and 90° of fault dip angle. With the increase of the dip angle from 45°, 70° to 90°, the surface equivalent strain is gradually smaller, the deformation of the overlying soil is smaller, and the deformation width of the upper wall will change from about 2 times that of the lower wall to the same as the lower wall. The deformation and rupture of the overlying soil first begin with the fracture of the soil mass at the interface between the fault bedrock and the soil. With the increase of the dislocation quantity, the surface also will appear 1 breakpoint when the fault angle is 45° and 70°, the ground surface will appear 2 breakpoints when the fault angle is 90°, and at last overlying soil is broken through.

华北克拉通破坏区是历史破坏性地震频发区,震源机制解和地震地表破裂带等反映出历史地震的发震断层为新生走滑断层,很难用地壳的伸展构造系统来合理解释.首先对1679年三河-平谷M 8.0级地震的大厂隐伏凹陷西边界夏垫断裂进行高分辨率地震勘探和上盘钻孔地层进行标定,然后在河套断陷盆地带大青山南麓晚更新世湖相地层中识别出2期角度不整合面(UC1和UC2),并进行了系统测年,综合近年来活动断层比例尺填图和城市活动断层探测成果,明确指出,在华北克拉通破坏区,代表新生代早期地壳伸展运动的铲形正断层的活动性在上新世至第四纪早期逐渐减弱,到晚更新世早期基本停止活动;晚更新世中期以来大青山构造运动为华北克拉通破坏区最新一期构造运动,主要表现为区域剪切应变条件下新生走滑断层形成和扩展,并伴随相关地震活动.最新构造运动的主要动力来源于青藏高原物质东向挤出,以及其对鄂尔多斯块体西南缘强烈东向推挤作用.这些新认识对深化华北克拉通破坏区地震发震机理研究,理解板内最新变形动力学,均具有十分重要的科学价值.

The Eastern Himalayan Syntaxis (EHS), as one of the most tectonically active regions on the Earth, is one of the best places to explore the relationship between tectonics and surface exhumation process. The uplift and exhumation history are often by one of two leading models: a stationary or localized "tectonic aneurysm" or a northeasterly "migrating crustal antiform". Previous researchers have placed great emphasis on the core zone of Namche Barwa antiform. However, the Dongjiu-Milin Fault Zone (DMFZ), which forms the northwestern boundary of the antiform and plays an important role for deformation process in the EHS, is still poorly understood. In this study, we focus on differential late-Cenozoic uplift across the DMFZ. We collected 10 bedrock samples in two vertical transects, one on the northwest side of the DMFZ on the Lhasa block and one on the southeast side on the Namche Barwa antiform, and conducted apatite fission track and zircon fission track analyses. Ten samples collected from the two vertical transects yield AFT ages between 3.2 million years ago (Ma) and 10.3 Ma and ZFT ages between 9.9 Ma and 12.9 Ma. A finite-element analysis reveals that the two sides of the DMFZ have undergone quite different uplift histories and processes in the late-Cenozoic: The Lhasa block is uniformly uplifted, while the Namche Barwa antiform is nonuniformly uplifted similar to a buckle fold. The phenomenon revealed in this study is best explained by a mechanism whereby the EHS is characterized by the northeasterly migration of an antiform.

We use GPS measurements across the Xidatan segment of the Kunlun fault in the Tibetan Plateau to investigate the surface deformation following the 2001 Mw 7.8 Kokoxili earthquake. We find significant postseismic deformation during the period 2007-2015, characterized by an asymmetric shear across the 2001 rupture, with average velocities reaching similar to 10 mm/year about 30-45 km south of the coseismic rupture. We also find that the postseismic transients diffused away from the coseismic rupture through time, with a shift of the maximum transient rates from similar to 20-30 km south of the rupture in 2001-2002 to similar to 30-45 km in 2007-2015. Viscoelastic relaxation is the dominant physical process during the period 2007-2015. The estimated effective viscosity of the lower crust beneath the Songpan-Ganzi terrane is 2 x 10(18)-3 x 10(18) Pa s from the 2001-2002 data, and it has increased to similar to 2 x 10(19) Pa s for the period 6 to 14 years after the event. The large asymmetry in the postseismic deformation field indicates a laterally heterogeneous lower crust beneath the northern Tibetan Plateau. Viscoelastic relaxation models show that the viscosity of the lower crust beneath the Qaidam basin is similar to 2 and similar to 4 times larger than the viscosity of the lower crust beneath the Songpan-Ganzi terrane in 2001-2002 and 2007-2015, respectively. Based on these data and results from previous studies, we postulate that the Kunlun fault itself is not the unique rheological boundary and that additional domains with viscosity increasing from the Qiangtang terrane to the Qaidam basin appear to be required. Plain Language Summary Viscoelastic relaxation of earthquake-induced deviatoric stress change can last for several decades. In 2001, the Mw7.8 Kokoxili earthquake occurred along the Kunlun fault in the northern Tibetan Plateau. GPS measurements in the first two decades after the 2001 event show (1) that postseismic transients diffused away from the fault and (2) that postseismic transients are asymmetric across the coseismic rupture. We find that lower crustal viscosity heterogeneity leads to the observed asymmetric deformation. Although geodetic data constraints with better spatial and temporal coverage are needed, we find that lower crustal viscosity may exhibit northward stepwise increase across the Jinsha River suture, Kunlun fault, and the southern margin of the Qaidam basin. Our findings provide new constraints on the lithospheric structure and tectonic deformation in the northern Tibetan Plateau.

Details of lithospheric structures in three-dimensions (3-D) are key to understanding the dynamics of crustal deformation and earthquakes in active orogenic systems. In this study, we develop a 3-D model of the eastern Tibetan Plateau using the Skua-Gocad software based on the latest Rayleigh wave tomography. We perform a quantitative modeling workflow to map the details of the Moho discontinuities and the high-velocity anomalies. Then, we integrate the topography, major active faults, large earthquakes, and crustal Poisson's ratios to analyze the relationship between the shallow and deep structures of this region. Our study shows that the Moho is generally coupled with the topography. A steep Moho ramp exists under the plateau margin and its surface projection intersects the Longmen Shan (LMS) at a low oblique angle (similar to 22 degrees). Active deformation and large earthquakes are related to the steep Moho ramp under the plateau margin. Moreover, based on a 3-D model of the Poisson's ratio perturbations, we find that deformation across the central LMS is characterized as a crocodile-type wedge in the crust and lithospheric mantle, due to the resistance of the Yangtze craton and isostatic rebound. We suggest that a tectonic wedging model that contains both the upper-crust thrusting and lower-crustal thickening contribute to the LMS orogeny. Three-dimensional visualization of the lithospheric structure is well suited to reveal the different levels of deformation and their relationships. Quantitative modeling methods provide effective constraints on the active blocks in the eastern Tibetan Plateau.

To establish an experimental,practical and open scientific experimental platform for earthquake monitoring and prediction,with reference to that of the southern California earthquake center (SCEC),China Earthquake Administration initiated a project for an experimental field in Sichuan and Yunnan Province in 2014.The chosen area is a seismically active region in the southeastern margin of the Tibetan plateau.A series of work compiling basic maps have been launched to collect fundamental data of this area including geologic structure,earthquake geology,geophysics,geodesy, and geochemistry.The map of earthquake surface ruptures in this region is one of these basic maps. This paper presents the compilation of this map.It includes earthquake epicenters,earthquake surface ruptures,faults,strata,magmatic rocks,and geographical data.This work summarized 87 destructive earthquakes,and 22 earthquake surface rupture zones,and analyzed the distribution characterization of earthquake epicenters,strata and magmatic rocks.The content in the map is reliable and integrated.This work will provide reliable earthquake-geology data for establishing geodynamics models and other future research of the national experimental field of earthquake monitoring and prediction in Sichuan and Yunnan Province.

国内外众多的大地震现场考察及其灾害现象分析研究表明,活动断层是地震的根源,也是地震灾害的元凶.查明地震活动断层的准确位置并对其属性和地震危险性做出科学评价,是地震灾害预防的重要基础性工作,备受世界各国政府和科学家重视.截至2017年年底,我国已经对141条活动断层实施1:50000地质填图(见图1),占全国活动断层总数495条的28.5%;已经开展城市活动断层探测工作的地级及以上城市合计97座,总投资8.98亿元.其中,全国共计有8893千米的活动断层填图和43条断层活动性的鉴定结果建立了数据库.

Different structure types of buildings have different structural characteristics and seismic performance. Earthquake disaster investigation and damage analysis results of different types of buildings can reflect the existing problems of China's urban residential buildings in the seismic structure design and construction process. This paper analyzes damage characteristics and earthquake disasters of main types of buildings, and can give seismic reinforcement measures of different types of buildings. It can be provided a reference for seismic performance survey and seismic reinforcement of Shandong province and nationwide buildings.

The Cenozoic orogenic process of the Longmen Shan (LMS) and the kinematics of major faults along the LMS are crucial for understanding the growth history and mechanism of the eastern Tibetan Plateau. Three major faults, from west to east, are present in the central segment of the LMS: the Wenchuan-Maoxian Fault (WMF), the Beichuan-Yingxiu Fault (BYF), and the Jiangyou-Guanxian Fault (JGF). Previous researchers have placed great impetus on the Pengguan Massif, between the WMF and BYF. However, limited low-temperature thermochronology data coverage in other areas prevents us from fully delineating the tectonic history of the LMS. In this study, we collect 22 samples from vertical profiles in the Xuelongbao Massif and the range frontal area located at the hanging walls of the WMF and JGF respectively, and conduct apatite and zircon fission track analyses. New fission track data reveal that the Xuelongbao Massif has been undergoing rapid exhumation with an average rate of ~0.7–0.9mm/yr since ~11Ma, and the range frontal area began rapid exhumation at ~7.5Ma with total exhumation of ~2.5–4.5km. The exhumation histories indicate that the three major faults (WMF, BYF and JGF) in the central LMS are all reverse faults, and show a basinward in-sequence propagation from middle Miocene to present-day. Such a pattern further implies that upper crustal shortening is the primary driver for the LMS' uplift during the Late Cenozoic. Nevertheless, middle-lower crustal deformation is difficult to be constrained by the exhumation histories, and its contribution to LMS' uplift cannot be ruled out.

The study of digital active fault database of storing and managing active fault survey data started in the 1990s.In the following 20 years,a systematic database framework has been developed,which provided fundamental data to minimize losses caused by earthquake disasters.In recent years,as the database framework developed and the range of information extended,some early designed attribute value codes are no longer adaptable to the new database framework.In order to build a more applicable attribute value coding system,we designed the coding rules respectively for three types of values:simple meaning character codes,simple meaning numerical codes and complex meaning codes.A new attribute value coding system has been built and discussed in this paper.The results show that the new system is helpful of increasing the efficiency of data entry,data detection,auto-mapping,data analysis and other relevant work.

According to the active faults and their avoidance zone width,their research history and current situation of development at home and abroad are systematically summarized,Existing problems in the research progress are discussed,and the prospect and suggestions for research are done.The research results can provide basic data for determination of avoidance width of active fault,and provide scientific references for buildings avoidance from active faults.

High-magnitude earthquake refers to an earthquake that can produce obvious surface ruptures along its seismogenic fault and its magnitude M is at least equal to 7.0.Prediction and identification of locations, where the high-magnitude earthquakes will occur in potential, is one of the scientific goals of the studies on long-term faulting behavior of active faults and paleo-earthquakes, and is also the key problem of earthquake prediction and forecast.The study of the geological and seismological signatures for identifying M≥7.0 earthquake risk areas and their application is an important part of seismic prediction researches.It can not only promote the development of earthquake science, especially the progress of earthquake monitoring and forecasting, but also be positive for earthquake disaster prevention and effective mitigation of possible earthquake disaster losses.It is also one of the earthquake science problems which the governments, societies and the scientific communities are very concerned about and need to be addressed.Large or great earthquakes, such as the 2008 Wenchuan earthquake(M8.0), the 2010 Yushu earthquake(M7.1), the 2013 Lushan earthquake(M7.0)and the 2015 Gorkha earthquake(MW7.8), have unceasingly struck the Qinghai-Tibet Plateau and its surrounding areas, which have been attracting attention of a large number of geoscientists both at home and abroad.Owing to good coverage of the seismic networks and GPS sations, a lot of high-quality publications in seismicity, crustal velocity structure, faulting beihavior have been pressed, which gives us a good chance to summarize some common features of these earthquakes.In this paper, seismogenic structural model of these earthquakes, faulting behavior of seismogenic faults, crustal mechanical property, recent straining environment and pre-earthquake seismicity are first analyzed, and then, five kinds of common features for the sismogenic faults where those earthquakes occurred.Those five kinds of commom features are, in fact, the geological and seismological signatures for identifying M≥7.0 earthquake risk areas.The reliability of the obtained sigatures is also discussed in brief.At last, based on the results of 1∶50000 active fault mapping, and published seismic tomography and fault-locking studies, an experimental identification of the risk areas for the future large/great earthquakes in the North China and the Qinghai-Tibet Plateau is conducted to test the scientificity and applicability of these obtained sigantures.

五台山北麓断裂位于山西地堑系北部.本文以五台山北麓断裂繁峙段的地质地貌为研究对象,分别在繁峙县的大峪村和岗里村两地断裂沿线进行了无人机测量.利用三维结构的运动重建技术(Structure from Motion,SfM)进行影像数据处理,得到高精度点云数据,并通过进一步处理获得了分辨率达0.Sm的高清断错地貌正射影像(DOM)和数字高程模型(DEM).通过对典型地区的详细野外调查和挖掘探槽等手段对该段晚第四纪的活动性进行研究,发现断层晚第四纪以来的活动主要是以正倾滑运动为主.同时在五台山北麓断裂沿线的大峪村、岗里村等地进行了断错地貌分析和晚第四纪滑动速率计算,得到约20ka以来的断层垂向滑动速率为0.4-0.6mm/a,近18ka以来该段发生过至少两次古地震事件.古地震事件和滑动速率分析表明,五台山北麓断裂晚第四纪,尤其是全新世以来活动强烈,且不同段落存在明显的活动性差异.