Acta Geophysica最新文献

{"title":"Application of the sequence stratigraphy approach to assess the hydrological potentiality of siliciclastic Miocene reservoir, North-Eastern Tunisia","authors":"Ramzi Gharsalli,&nbsp;Hajer Azaiez","doi":"10.1007/s11600-025-01600-x","DOIUrl":"10.1007/s11600-025-01600-x","url":null,"abstract":"<div><p>In the Cap Bon Peninsula, to the north-eastern part of Tunisia, the Miocene siliciclastic deposits constitute the main source for drinking and irrigation water. Nevertheless, the recognition of the subsurface lateral distribution and facies variation, of these deposits, need to be improved. The methodology we adopted, to investigate these reservoir levels, was based on a detailed outcrop survey of several lithostratigraphic sections in the Jebel Abderrahmane area, associated to the interpretation of key subsurface seismic reflection profiles calibrated to petroleum well data. The combination of several exploration techniques and analysis tools, such as sequence stratigraphy, wireline logging records, seismic data and lithostratigraphic cross sections, enabled to identify the Miocene depositional sequence organization on outcrops. It also allowed us to characterize the sandy levels likely to constitute potential reservoirs and to perceive their equivalents in subsurface. The lithostratigraphic cross-sectional survey carried out around Jebel Abderrahmane area shows only five third-order depositional sequences, separated by regional chronological surfaces. Through these lithostratigraphic sections, we have identified five potential siliciclastic reservoirs. Most of them are represented by lowstand system tract deposits. The sequence stratigraphic analysis, of subsurface Miocene series, was performed using several seismic lines calibrated to petroleum well data. These series are commonly more complete in grabens and syncline gutters, in which seven third-order Miocene seismic sequences and six associated potential reservoirs have been identified. The chronostratigraphic correlations of the Miocene deposits on according lithostratigraphic sections were based on regional key sequence stratigraphic surfaces, instead of commonly used geological formation tops. These correlation profiles reveal significant thickness and facies variations of the Miocene deposits induced by the tectonic activity. The latter puts in place two distinct depositional environments on both sides of Jebel Abderrahmane, in which the Miocene aquifers show different hydrogeological characteristics. Recent hydrogeological studies in the area prove the importance of the subsurface Oligo-Miocene sandstones as potential aquifers with significant groundwater reserves. </p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4259 - 4276"},"PeriodicalIF":2.1,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation on coda wave attenuation in shallow media using dense array data from airgun and natural seismic sources","authors":"Shen Du,&nbsp;Zhenbiao Liu,&nbsp;Liang Xiao","doi":"10.1007/s11600-025-01616-3","DOIUrl":"10.1007/s11600-025-01616-3","url":null,"abstract":"<div><p>Accurate shallow media <i>Q</i> value parameters are essential for engineering applications such as ground motion simulation. This study focuses on the Binchuan Basin in Yunnan Province, China, and employs the Sato single-scattering model based on dense array data from both airgun source and natural earthquake sources to investigate the accurate coda wave <i>Q</i> value (<i>Qc</i>) distribution characteristics of shallow media in the region. The results indicate that the <i>Qc</i> values obtained in this study fall between those of the near-surface and deep media. By quantitatively analyzing the effects of station spacing of dense arrays and epicenter distance on the calculation results, we find that for engineering applications such as near-site ground motion simulations, the minimum station spacing can be controlled at approximately 8 km, whereas the spacing of stations can be controlled at less than 4 km to obtain the spatial distribution characteristics of the <i>Qc</i> values. It is preferable to control the epicenter distance within 40 km to obtain richer shallow media information without considering the effect of source depth. This study provides new insights into the application of dense array data from airgun and natural sources for engineering seismology and shallow structure detection.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4243 - 4257"},"PeriodicalIF":2.1,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11600-025-01616-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893982","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}

{"title":"Diffraction separation method using shapeDTW and median-mean filter","authors":"Tongjie Sheng,&nbsp;Jingtao Zhao,&nbsp;Yang Jie,&nbsp;Zongnan Chen","doi":"10.1007/s11600-025-01614-5","DOIUrl":"10.1007/s11600-025-01614-5","url":null,"abstract":"<div><p>The subsurface small-scale geological structures are manifested as diffractions in seismic data. Diffraction imaging provides high-resolution details of discontinuities such as faults, collapse columns, and karst caves. However, this high-resolution information is often obfuscated by strong reflections, necessitating their removal prior to diffraction imaging. Here, we propose a novel diffraction separation method based on shape dynamic time warping (shapeDTW) and median-mean filter. The shapeDTW is an effective time series alignment method that utilizes the distance between temporal points within a neighborhood as the alignment criterion, which accurately aligns strong energy events in seismic data. We implement shapeDTW to construct flattened reflection gathers, in which reflections are aligned and therefore behave as horizontal events with consistently strong amplitudes, while diffractions appear as non-horizontal weak events. Leveraging this difference in shape and amplitude, the median-mean filter can effectively extract reflections from flattened reflection gathers. Diffractions are separated from seismic data by subtracting extracted reflections. The synthetic data experiment confirms the feasibility of the proposed method in eliminating strong reflections while preserving weak diffractions related to karst caves in seismic data with a low signal-to-noise ratio. The field data application further illustrates its effectiveness in removing strong high-slope reflections and highlighting small-scale fracture-related detailed features.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4217 - 4241"},"PeriodicalIF":2.1,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geoelectrical resistivity imaging as a reliable input for building sustainable agroecological models: a case in southwestern Nigeria","authors":"Kehinde David Oyeyemi,&nbsp;Shiv Mangal Gupta,&nbsp;Prawan Koppula,&nbsp;Kushal Pal Singh","doi":"10.1007/s11600-025-01610-9","DOIUrl":"10.1007/s11600-025-01610-9","url":null,"abstract":"<div><p>Promoting sustainable agricultural methods is vital in addressing a range of challenges associated with food security, including issues such as diminishing soil fertility and insufficient crop yield. Geoelectrical resistivity imaging serves as a valuable tool for constructing enduring agroecological models. This research presents findings of the application of geoelectrical resistivity imaging to evaluate the agricultural soil quality in terms of nutrients, moisture levels, and organic matter content. Five parallel 100-m-length 2D electrical resistivity tomography (ERT) profiles were conducted, with a minimum spacing of 5 m and reaching a maximum depth of six levels (30 m). Additionally, soil parameters and nutrient content of twenty soil samples from the study area were analyzed to assess the soil fertility level for agricultural practice. The results revealed that the subsoil can be categorized into three geoelectrical units based on inverse model resistivity values: water-saturated soils (5–20 Ωm), moist soils (21–80 Ωm), and dry soils (&gt; 100 Ωm). The near-surface subsoils up to about 10 m exhibit higher moisture content, indicating potentially enhanced soil fertility due to improved water availability for plant growth and nutrient uptake. Measured soil parameters reveal ranges of organic matter content (41–98%), electrical conductivity (0.15–0.48 dS/m), and pH values (4.11–8.11). Furthermore, the concentrations of microelements within the near-surface subsoils samples were measured, showing ranges of 176–315 ppm for nitrogen, 25.78–99.78 ppm for phosphorus, and 149–605 ppm for potassium. This study highlights the significance and effectiveness of the geoelectrical resistivity method in evaluating soil fertility for precision agriculture purposes. The method strengthens the core of agroecological models by offering vital subsurface and spatial insights. It empowers well-informed decision-making, supports the practice of sustainable land management, and actively fosters the growth of robust agricultural systems. </p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4183 - 4198"},"PeriodicalIF":2.1,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stacking velocity analysis from rugged topography","authors":"Rongwei Xu,&nbsp;Bo Feng,&nbsp;Huazhong Wang,&nbsp;Chengliang Wu,&nbsp;Shouwei Liu","doi":"10.1007/s11600-025-01613-6","DOIUrl":"10.1007/s11600-025-01613-6","url":null,"abstract":"<div><p>Stacking velocity analysis is generally performed under the assumption of a flat surface. However, in mountainous regions, the presence of an undulating surface violates this assumption, necessitating static corrections for stacking velocity analysis. Accurately calculating static corrections, however, is challenging, making it difficult to completely eliminate the time shifts introduced by surface topography and restore the hyperbolic time–offset relationship of the reflection. Therefore, it is crucial to minimize the use of static corrections during time-domain stacking velocity analysis. Building on previous research, we propose a method to calculate reflection wave travel time under undulating surface conditions without the need for static correction. Under the assumption of slow lateral velocity variations, the root-mean-square velocity and two-way vertical time (<span>(t_{0})</span>) for each shot point and receiver point are calculated using the Dix formula separately, followed by the computation of travel time from shot point and receiver point to reflection point, yielding the reflection travel time in the time domain. This time-domain reflection travel time calculation method is applied to stacking velocity analysis of mountainous data with undulating surface conditions. This method greatly improves the accuracy of travel time calculations for reflection waves, enhancing velocity estimation under complex surface conditions. Numerical experiments validate the effectiveness of the proposed approach.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4199 - 4215"},"PeriodicalIF":2.1,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Buried object detection using cross-correlation and wavelet coherence analysis of MASW datasets","authors":"Prabhakar Vishwakarma,&nbsp;Amit Prashant","doi":"10.1007/s11600-025-01591-9","DOIUrl":"10.1007/s11600-025-01591-9","url":null,"abstract":"<div><p>This study focuses on buried object detection using the cross-correlation and wavelet coherence of multichannel analysis of surface waves (MASW) datasets. Underground objects (pipes, building foundations, and rocks) create large-scale heterogeneity in the soil medium. The dispersion curves obtained from the multi-configuration roll-along MASW tests can provide approximate locations of buried objects within the corresponding sensor layouts. However, analyzing the responses of pairs of sensors from the MASW wavefields can indicate the more precise location of such objects. Two circular underground pipes and one square-shaped buried object were simulated using finite element modeling, representing different field scenarios. The wave scattering phenomena have been studied by looking at the wave propagation snapshots in these heterogeneous soil mediums. The cross-correlation analysis from the responses of sensors indicated the exact horizontal position of the buried object, further verified by the wavelet coherence of pairs of sensors. Considering the horizontal position of the different buried objects and phase of the high wavelet coherence patch, the values of phase velocities of 3114, 2308, and 2412 m/s, and respective wavelengths of 30.52, 23.08, and 24.12 m were calculated, which were used to interpret the shear wave velocities ranging from 2538 to 3424 m/s and depths ranging from 4 to 6 m of buried objects. These analyses accurately determined the physical horizontal position and embedment depth of square- and circular-shaped buried objects than the conventional 1D MASW approach.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4165 - 4181"},"PeriodicalIF":2.1,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial–temporal variations of b-value and DC-value prior to the November 12, 2017, Mw 7.3 earthquake in Sarpol-e Zahab, Zagros, Iran","authors":"Muhammed Hossein Mousavi,&nbsp;Amir Talebi,&nbsp;Faegheh Mina Araghi,&nbsp;Malihe Maqouli","doi":"10.1007/s11600-025-01605-6","DOIUrl":"10.1007/s11600-025-01605-6","url":null,"abstract":"<div><p>The occurrence of the 7.3 magnitude Sarpol-e Zahab earthquake on November 12, 2017, in the Zagros region underscored the importance of conducting a comprehensive seismicity analysis in this area. In this study, we have analyzed the spatiotemporal variation of the seismic <i>b</i>-value and <i>D</i>_C-value in the vicinity of the Sarpol-e Zahab earthquake and surrounding region using a unified and homogeneous earthquake catalog spanning 01/01/2006–10/31/2024 belong to the Iranian Seismological Center (IRSC). In the tectonically active parts of the study area, <i>b</i>-values range from 0.4 to 1.4. According to the results, prior to the mainshock, the <i>b</i>-value exhibited low values in the vicinity of the Sarpol-e Zahab earthquake, suggesting significant stress accumulation and an imminent rupture. In contrast, the <i>D</i>_C-value displayed higher values, indicating increased fault heterogeneity and crack complexity as the fault approached failure. Immediately after the mainshock, the <i>b</i>-value increased sharply, corresponding to stress release and a dominance of smaller aftershocks, whereas, the <i>D</i>_C-value decreased. The temporal <i>b</i>-value curve shows a decreasing trend before the occurrence of the November 12, 2017, Mw 7.3 earthquake. Temporal analysis of the <i>b</i>-value also reveals a clear increase post-mainshock, indicating stress redistribution and ongoing fault healing. The concentration of low <i>b</i>-values (<i>b</i> &lt; 0.5) between 10 and 20 km depth suggests a potential for stress concentration in this depth range. These findings demonstrate the complementary roles of <i>b</i>-value and <i>D</i>_C-value in characterizing seismic behavior and fault evolution. In the tectonically active regions of the study area, which correlate to the reverse/thrust and strike-slip active faults, the <i>b</i>-values and <i>D</i>_C-values range from 0.4 to 1.4 and from 1.5 to 4, respectively. The observed patterns provide valuable insights into pre-seismic stress buildup, post-seismic stress relaxation, and faulting processes.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"3829 - 3847"},"PeriodicalIF":2.1,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simplified interpretation method by combining interval and direct methods for seismic downhole tests","authors":"Ayush Kumar,&nbsp;P. Anbazhagan","doi":"10.1007/s11600-025-01607-4","DOIUrl":"10.1007/s11600-025-01607-4","url":null,"abstract":"<div><p>Conventional downhole survey interpretation utilizes a straight raypath assumption from source to receiver, neglecting subsurface refractions along the travel path, which simplifies the estimation of shear wave velocity (<span>({V}_{S})</span>) profiles and average velocity (<span>({{V}^{z}_{S}})</span>). Out of the most commonly used direct method (DM) and interval method (IM), IM is susceptible to sudden changes in subsurface stiffness due to high impedance contrast and anomalies, prompting the use of more detailed refracted raypath method (RRM) in such cases. However, RRM requires velocity of all the layers above the depth concerned. To avoid such dependency on the previous layers, a new interpretation approach combined direct interval method (CDIM) is proposed. The interfaces at impedance contrasts were observed to cause errors in <span>({V}_{S})</span> estimation while using IM. A parametric model study was conducted with varying depths and magnitude of impedance contrasts. Model study and downhole data acquired from five test sites showed that the errors associated with <span>({V}_{S})</span> estimation using CDIM are substantially lower than IM. The interval length for all the interpretation methods converges to the testing interval as the depth increases, which signifies that for greater depths and in the absence of high impedance contrasts in shallow depths, proposed CDIM offers a streamlined and fast interpretation, applicable for any geology and subsurface layering condition and can provide quick resolution of <span>({V}_{S})</span> profiles.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4149 - 4163"},"PeriodicalIF":2.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive truncated regularized Newton full-waveform inversion method","authors":"Panpan Wu,&nbsp;Meng Ji,&nbsp;Qinglong He","doi":"10.1007/s11600-025-01588-4","DOIUrl":"10.1007/s11600-025-01588-4","url":null,"abstract":"<div><p>The regularized Newton method is a modified cubic Newton method, which has a fast convergence speed and high computational efficiency. However, when this regularized Newton method is applied to solving the large-scale full-waveform inversion (FWI) problem, it is prohibitive to exactly solve the large-scale regularized Newton equation due to its large computations and mass storage requirements. Moreover, it is also very difficult to accurately estimate the Lipschitz constant for the highly nonlinear and large-scale FWI problem. In this study, we propose an adaptive truncated regularized Newton method based on the regularized Newton method to solve the FWI problem. The main idea of our proposed method is that the regularized Newton equation is inexactly solved by using the well-known conjugate gradient method, and the Lipschitz constant of the second-order derivatives is adaptively updated by using a similar update strategy of the trust-region radius in the framework of the trust-region scheme. The elegant advantage of the adaptive truncated regularized Newton method is that it is a matrix-free scheme. This proposed method mitigates the requirements of both large computations and mass storage. Therefore, it is very suitable for solving the large-scale inverse problems. Numerical experiments based on BP 2004, Sigsbee, and Overthrust models are presented to show the numerical performance of this proposed method. Compared with L-BFGS and the standard truncated Newton method, the adaptive truncated regularized Newton method has a faster convergence speed and higher computational efficiency.</p></div>","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"4129 - 4147"},"PeriodicalIF":2.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The seismogenic structure and dynamic origins of the 2023 Qingpu ML3.7 earthquake","authors":"Suxiang Zhang,&nbsp;Shuzhong Sheng,&nbsp;Yinglei Dai,&nbsp;Ce Feng,&nbsp;Jinlei Li,&nbsp;Xiuqing Song","doi":"10.1007/s11600-025-01596-4","DOIUrl":"10.1007/s11600-025-01596-4","url":null,"abstract":"&lt;div&gt;&lt;p&gt;On June 15, 2023, a significant &lt;span&gt;({M}_{text{L}})&lt;/span&gt;3.7 earthquake occurred in the Qingpu District of Shanghai, China. This event holds particular importance as the inland areas of Shanghai have not previously recorded earthquakes above &lt;span&gt;({M}_{text{L}})&lt;/span&gt;3.5. To investigate the seismogenic structure of this earthquake and its relation to the tectonic stress field in the region, our study initially utilized the FOCMEC and HASH methods to invert the focal mechanism solutions for this earthquake, establishing credible centroid solution based on these results. Subsequently, leveraging previous research on the stress field in the southern Jiangsu region, we computed the corresponding maximum horizontal principal stress direction and compared it with the principal strain rate direction in the Qingpu area, as well as the fast wave polarization direction of shear wave splitting, thereby obtaining a reliable regional stress field for Qingpu area. Lastly, projecting the regional stress field onto the two nodal planes of the &lt;span&gt;({M}_{text{L}})&lt;/span&gt;3.7 earthquake's centroid solution, we obtained relative shear and normal stress values and determined the theoretical seismogenic plane. Based on the identified seismogenic plane, this study relocates the depth of the seismic source and projects the source onto the longitudinal profile of the S-wave velocity structure of the seismogenic structure to obtain its seismogenic environment. The final results are as follows: (1) The centroid solution for the focal mechanism of the &lt;span&gt;({M}_{text{L}})&lt;/span&gt;3.7 earthquake indicates a strike of 26.2°, a dip of 86.0°, and a rake angle of 159.8° for fault plane I, and a strike of 117.7°, a dip of 69.8°, and a rake angle of 4.2° for fault plane II, suggesting a strike-slip earthquake. (2) In the study area, the azimuth of the maximum principal stress axis is northeast (NE), with a near-horizontal plunge, while the azimuth of the minimum principal stress axis is northwest (NW), with a vertical plunge, indicating a predominantly compressional stress regime, typical of a strike-slip stress state. (3) The relative shear and normal stress values on fault plane I are 0.827 and 0.365, respectively, while on fault plane II, they are 0.871 and − 0.623, respectively, indicating that fault plane I is the theoretical seismogenic fault plane. By considering the geological structural characteristics around the earthquake location, the orientation of the major axis of isoseismal, and the fault parameters of the theoretical seismogenic plane, it is inferred that the seismogenic fault for this earthquake is the NNE-oriented Yaojiagang-Baihe fault, with the theoretical seismogenic plane being the actual seismogenic plane. (4) The earthquake was repositioned to a depth of 6.6 km, and the location was at the junction of high and low velocities of the Yaojiagang-Baihe fault, which possesses the media conditions for the accumulation of a large amount of strain ene","PeriodicalId":6988,"journal":{"name":"Acta Geophysica","volume":"73 5","pages":"3799 - 3809"},"PeriodicalIF":2.1,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144894009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}