Earthquake Science最新文献

{"title":"Overview of the virtual special issue on the 2023 Kahramanmaraş, Türkiye earthquake doublet","authors":"Han Yue , Hongfeng Yang , Xiaodong Song","doi":"10.1016/j.eqs.2024.04.001","DOIUrl":"https://doi.org/10.1016/j.eqs.2024.04.001","url":null,"abstract":"","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 4","pages":"Pages 383-385"},"PeriodicalIF":1.2,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000442/pdfft?md5=46776ed470c60444405b7f7e1b9bf673&pid=1-s2.0-S1674451924000442-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607541","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":"Co and postseismic fault slip models of the 2022 MW6.7 Menyuan earthquake reveal conjugated faulting tectonics at the central section of the Lenglongling fault","authors":"Zilong He ,&nbsp;Wenbin Xu ,&nbsp;Zhiwei Li ,&nbsp;Lei Xie ,&nbsp;Guangcai Feng ,&nbsp;Nan Fang ,&nbsp;Xiaoge Liu ,&nbsp;Kai Sun ,&nbsp;Zhidan Chen ,&nbsp;Zhihui Zhu","doi":"10.1016/j.eqs.2024.04.008","DOIUrl":"https://doi.org/10.1016/j.eqs.2024.04.008","url":null,"abstract":"<div><p>The 2022 <em>M</em>_W6.7 Menyuan earthquake ruptured the western end of the Tianzhu seismic gap, providing an opportunity to study the regional seismogenic characteristics and seismic hazards. Here we use interferometric synthetic aperture radar (InSAR) and seismic data to study the mainshock rupture, early afterslip and the second largest aftershock of the 2022 Menyuan earthquake sequences. Our modeling results show that the mainshock ruptured the Lenglongling fault and the Tuolaishan fault with a maximum slip of ∼3 m. Rapid postseismic transient deformation occurred at the center of the Lenglongling fault. Our afterslip modeling reveals that the majority of afterslip occurred in the deeper part of the Lenglongling fault. A high-angle conjugated faulting event is found at the middle section of the Lenglongling fault. We use the stress inversion to investigate the possible triggering mechanism of the conjugated rupture event. The results indicate the maximum principal stress direction is in ∼222°, forming a ∼22° angle between the conjugated fault of second largest aftershock and the mainshock. The calculated normal stress changes indicate the region is within a pull-apart stress field, which favors such a conjugated rupturing event. Our study will help understand the rupture behavior of such kind of conjugated fault in other regions.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 4","pages":"Pages 277-303"},"PeriodicalIF":1.2,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S167445192400051X/pdfft?md5=41711fe57e3b5356221237778ca056c0&pid=1-s2.0-S167445192400051X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607536","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":"Shear wave velocity model using HVSR inversion beneath Bandar Lampung City","authors":"Ahmad Zaenudin ,&nbsp;Alhada Farduwin ,&nbsp;Gede I. Boy Darmawan ,&nbsp;Karyanto","doi":"10.1016/j.eqs.2024.04.004","DOIUrl":"https://doi.org/10.1016/j.eqs.2024.04.004","url":null,"abstract":"<div><p>The horizontal-to-vertical spectral ratio (HVSR) method has been used to characterize site-effect parameters that are indispensable in seismic hazard and risk-reduction studies in urban areas and rapid land-use planning. This method is widely used because it is the cheapest and simplest geophysical method for the acquisition and processing stages. In subsequent developments, the HVSR method has been widely used to determine elastic rock parameters, particularly shear wave velocity (<em>v</em>_S), through the HVSR curve inversion process. Furthermore, the <em>v</em>_S structural model can be used to delineate the presence of complex geological structures, particularly faults and sedimentary basins. Bandar Lampung is a city in Lampung Province with many fault structures and groundwater basins to the south. There are 83 HVSR measurement points around Bandar Lampung for delineating the presence of fault structures and groundwater basins. We produced the HVSR curve from the measurement results and then performed an inversion process using the particle swarm optimization algorithm to obtain <em>v</em>_S for the depth profile. Subsequently, from this profile, we produced a two-dimensional (2D) lateral and vertical model. The mean <em>v</em>_S value was calculated from all the measurement points, and we found stiff soil layers reaching depths of approximately 5 m, with a value of <em>v</em>_S &lt; 330 m/s. A bedrock layer with a velocity exceeding 1250 m/s was visible at a depth of 100 m. Based on the 2D model, the <em>v</em>_S structure shows that the city of Bandar Lampung is divided into two zones, with a NW-SE boundary. The north-middle-eastern part of the city consists of harder rocks. This harder rock is characterized by extremely high <em>v</em>_S values, starting from a depth of 50 m. In contrast, the south-middle-west exhibits a low-moderate <em>v</em>_S anomaly associated with groundwater basins SW of the city. From the 2D <em>v</em>_S structural model, fault structures can be found along the city, characterized by a contrast of <em>v</em>_S values from low to medium and from medium to high.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 4","pages":"Pages 337-351"},"PeriodicalIF":1.2,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000478/pdfft?md5=69840edfcf9764edc9f33466eb7d73e0&pid=1-s2.0-S1674451924000478-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607539","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":"Source parameters and aftershock pattern of the October 7, 2021, M5.9 Harnai earthquake, Pakistan","authors":"Mohammad Tahir,&nbsp;Zeeshan Ahmad,&nbsp;Sadia Sabahat,&nbsp;Muhammad Naveed Mushtaq,&nbsp;Talat Iqbal,&nbsp;Muhammad Ali Shah,&nbsp;Alam Aftab","doi":"10.1016/j.eqs.2024.04.007","DOIUrl":"https://doi.org/10.1016/j.eqs.2024.04.007","url":null,"abstract":"<div><p>On October 7, 2021, a magnitude 5.9 earthquake struck the Harnai (Baluchistan) region of Pakistan, causing several fatalities and injuries within the epicentral area. First-order tectonic deformation in this region is caused by the convergence of the Indian Plate with respect to the Eurasian Plate. The Katwaz Block hinders the motion of the Indian Plate, resulting in the formation of strike-slip faults. In this study, the P-wave first-motion polarity technique was used to determine the mainshock faulting style. Cyclic scanning of the polarity solutions was applied to determine the most suitable focal mechanism solution among the available solutions generated by the FOCMEC (focal mechanism) software. The nodal planes correspond to different faulting styles (i.e., thrust and strike-slip faulting). A nodal plane oriented in the NW-SE direction corresponded to a strike-slip mechanism, which was considered to be the fault plane. Tectonically, this earthquake was associated with the Harnai-Karahi strike-slip fault zone owing to the fault strike and direction of slip. The apparent stress drop, fault length, and moment magnitude of the Harnai earthquake were 35.4 bar, 6.1 km, and 5.9, respectively. A lower <em>b</em>-value for the Gutenberg-Richter law was observed prior to the earthquake. Higher <em>α</em>- than <em>b</em>-values (<em>α</em> &gt; <em>b</em>) indicate that this earthquake was governed by large events as opposed to small-magnitude events. The Harnai sequence had a decay exponent close to unity, lasted for 145 days, and produced few aftershocks. The study will help the future hazard mitigation in the region.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 4","pages":"Pages 304-323"},"PeriodicalIF":1.2,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000508/pdfft?md5=1620d8ed554ff0583961229e7be8804a&pid=1-s2.0-S1674451924000508-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607538","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":"Seismicity patterns before the 2021 Fin (Iran) doublet earthquakes using the region-time-length and time-to-failure methods","authors":"Salma Ommi ,&nbsp;Vladimir Borisovich Smirnov","doi":"10.1016/j.eqs.2024.04.005","DOIUrl":"https://doi.org/10.1016/j.eqs.2024.04.005","url":null,"abstract":"<div><p>Knowledge regarding earthquake hazards and seismicity is crucial for crisis management, and the occurrence of foreshocks, seismic activity patterns, and spatiotemporal variations in seismic activity have been studied. Furthermore, the estimation of the region-time-length (RTL) parameter has been proposed to detect seismic quiescence before the occurrence of a large earthquake. In addition, the time-to-failure method has been used to estimate the time occurrence of large earthquakes. Hence, in this study, to gain deeper insight into seismic activity in the southern Zagros region, we utilized the RTL algorithm to identify the quiescence and activation phases leading to the Fin doublet earthquakes. Temporal variations in the RTL parameter showed two significant anomalies. One corresponded to the occurrence time of the first earthquake (2017-12-12); the other anomaly was associated with the occurrence time of the second event (2021-11-14). Based on a negative value of the RTL parameter observed in the vicinity of the Fin epicenters (2021), seismic quiescence (a decrease in seismicity compared to the preceding background rate) was identified. The spatial distribution of the RTL prognostic parameters confirms the appearance of seismic quiescence surrounding the epicenter of the Fin doublet earthquakes (2021). The time-to-failure method was designed using precursory events that describe the acceleration of the seismic energy release before the mainshock. Using the time-to-failure method for the earthquake catalog, it was possible to estimate both the magnitude and time of failure of the Fin doublet. Hence, the time-to-failure technique can be a useful supplementary method to the RTL algorithm for determining the characteristics of impending earthquakes.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 4","pages":"Pages 324-336"},"PeriodicalIF":1.2,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S167445192400048X/pdfft?md5=3091c0da3bf67890ea2f5229ea136984&pid=1-s2.0-S167445192400048X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141607633","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":"Experimental investigation on the origin of carbonaceous materials in the fault zone of the Wenchuan earthquake","authors":"Deyang Shi ,&nbsp;Yaowei Liu ,&nbsp;Jin Shi","doi":"10.1016/j.eqs.2024.03.001","DOIUrl":"10.1016/j.eqs.2024.03.001","url":null,"abstract":"<div><p>Carbonaceous materials in seismic fault zones may considerably influence seismic fault slip; however, the formation mechanism of carbonaceous materials remains unclear. In this study, we proposed a novel hypothesis for the formation of carbonaceous materials in fault gouge. Thus, we conducted a CO₂ hydrogenation experiment in a high-temperature reactor at a co-seismic temperature, with fault gouge formed during the Wenchuan earthquake as the catalyst. Our experimental results demonstrate that carbonaceous materials in fault zones are formed on the fault gouge during the chemical reaction process, suggesting that the carbonaceous materials are possibly generated from the catalytic hydrogenation of CO₂, followed by thermal cracking of its products. The results of this study provide a theoretical basis for understanding fault behavior and earthquake physics.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 3","pages":"Pages 189-199"},"PeriodicalIF":1.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000387/pdfft?md5=0e7614e3cca9617fd2d1449bffc5f734&pid=1-s2.0-S1674451924000387-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141235353","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":"A review of geophysical studies on the Mongolian Plateau","authors":"Lei Zhang ,&nbsp;Zhouchuan Huang ,&nbsp;Xiaodong Song ,&nbsp;Qingju Wu","doi":"10.1016/j.eqs.2024.03.004","DOIUrl":"10.1016/j.eqs.2024.03.004","url":null,"abstract":"<div><p>The Mongolian Plateau in Central Asia is an intracontinental tectonic system far from active plate boundaries. Despite its distance from these boundaries, the plateau is characterized by intense crustal deformation accompanied by voluminous Cenozoic volcanism and active modern seismicity. However, the intraplate deformation mechanism has long been debated owing to the scarcity of observations and contradictions between different results. In recent years, growing geophysical studies have been conducted on the Mongolian Plateau, providing constraints on its lithospheric structure and dynamics. Here, we review the geophysical research on the Mongolian Plateau over the last decade, including seismological, geodetic, gravity, magnetotelluric, and geodynamic aspects. This review aims to (a) describe crustal and mantle structures based on multiscale seismic images; (b) describe deformation patterns based on seismic anisotropy, focal mechanisms, and global positioning system (GPS) observations; and (c) discuss the mechanisms behind intraplate deformation, volcanism, and seismic activity across the Mongolian Plateau. Seismic images show that the crustal structure of the plateau has significant east-west differences. Several blocks in the western Mongolian Plateau have thick crusts, including the Altai Mountains, Hovsgol Rift, and Hangay Dome. The lithospheric deformation across the Mongolian Plateau has strong lateral variation, with NE-SW shortening in the Altai Mountains and W-E or NW-SE shear deformation in the Hangay Dome region and the eastern part. The varied deformation may result from the superposition of multiple mechanisms, including far-field stress in the Altai Mountains, mantle upwelling, and mantle flow in the Hangay Dome region. However, it is difficult to identify the geodynamics of the formation of the entire Mongolian Plateau because the deformation is too complicated, and the present models are not sufficient and are always partial. Overall, this review encompasses recent advances in seismic observations of the Mongolian Plateau, illuminates the heterogeneities in the crust and mantle structure and deformation of the plateau, and discusses the mechanisms behind the deformation, magmatism, and seismicity.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 3","pages":"Pages 224-240"},"PeriodicalIF":1.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000417/pdfft?md5=efdf33b44660803f1281a78607bfa1e2&pid=1-s2.0-S1674451924000417-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234196","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":"Investigating the reactivation of historical landslides during the 2022 Luding MS6.8 earthquake","authors":"Tao Wei,&nbsp;Mingyao Xia,&nbsp;Xinxin Zhang,&nbsp;Shaojian Qi","doi":"10.1016/j.eqs.2024.03.002","DOIUrl":"10.1016/j.eqs.2024.03.002","url":null,"abstract":"<div><p>On September 5, 2022, a strong earthquake with a magnitude of <em>M</em>_S6.8 struck Luding County in Sichuan Province, China, triggering thousands of landslides along the Dadu River in the northwest-southeast (NW-SE) direction. We investigated the reactivation characteristics of historical landslides within the epicentral area of the Luding earthquake to identify the initiation mechanism of earthquake-induced landslides. Records of the two newly triggered and historical landslides were analyzed using manual and threshold methods; the spatial distribution of landslides was assessed in relation to topographical and geological factors using remote sensing images. This study sheds light on the spatial distribution patterns of landslides, especially those that occur above historical landslide areas. Our results revealed a similarity in the spatial distribution trends between historical landslides and new ones induced by earthquakes. These landslides tend to be concentrated within a range of 0.2 km from the river and 2 km from the fault. Notably, both rivers and faults predominantly influenced the reactivation of historical landslides. Remarkably, the reactivated landslides are characterized by their small to medium size and are predominantly situated in historical landslide zones. The number of reactivated landslides surpassed that of previously documented historical landslides within the study area. We provide insights into the critical factors responsible for historical landslides during the 2022 Luding earthquake, thereby enhancing our understanding of the potential implications for future co-seismic hazard assessments and mitigation strategies.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 3","pages":"Pages 200-209"},"PeriodicalIF":1.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000399/pdfft?md5=0834e2e84b7fb1405335ac13fc74f845&pid=1-s2.0-S1674451924000399-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141231838","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":"South China Sea Typhoon Hagibis enhanced Xinfengjiang Reservoir seismicity","authors":"Peng Zhang ,&nbsp;Xinlei Sun ,&nbsp;Yandi Zeng ,&nbsp;Zhuo Xiao ,&nbsp;Runqing Huang","doi":"10.1016/j.eqs.2024.03.003","DOIUrl":"10.1016/j.eqs.2024.03.003","url":null,"abstract":"<div><p>There was an evident increase in the number of earthquakes in the Xinfengjiang Reservoir from June to July 2014 after the landing of Typhoon Hagibis. To understand the spatial and temporal evolution of this microseismicity, we built a high-precision earthquake catalog for 2014 and relocated 2275 events using recently developed methods for event picking and catalog construction. Seismicity occurred in the southeastern part of the reservoir, with the preferred fault plane orientation aligned along the Heyuan Fault. The total seismic energy peaked when the typhoon passed through the reservoir, and seismicity correlated with typhoon energy. In contrast, a limited seismic response was observed during the later Typhoon Rammasun. Combining data regarding the water level in the Xinfengjiang Reservoir and seismicity frequency changes in the Taiwan region during these two typhoon events, we suggest that typhoon activity may increase microseism energy by impacting fault stability around the Xinfengjiang Reservoir. Whether a fault can be activated also depends on how close the stress accumulation is to its failure point.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 3","pages":"Pages 210-223"},"PeriodicalIF":1.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000405/pdfft?md5=d59f6bd3e003672e9e8101e0d9d1f91e&pid=1-s2.0-S1674451924000405-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141232824","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":"Coseismic deformation and fault slip distribution of the 2023 MW7.8 and MW7.6 earthquakes in Türkiye","authors":"Weikang Li ,&nbsp;Lijiang Zhao ,&nbsp;Kai Tan ,&nbsp;Xiaofei Lu ,&nbsp;Caihong Zhang ,&nbsp;Chengtao Li ,&nbsp;Shuaishuai Han","doi":"10.1016/j.eqs.2024.03.006","DOIUrl":"10.1016/j.eqs.2024.03.006","url":null,"abstract":"<div><p>On February 6, 2023, a devastating earthquake with a moment magnitude of <em>M</em>_W7.8 struck the town of Pazarcik in south-central Türkiye, followed by another powerful earthquake with a moment magnitude of <em>M</em>_W7.6 that struck the nearby city of Elbistan 9 h later. To study the characteristics of surface deformation caused by this event and the influence of fault rupture, this study calculated the static coseismic deformation of 56 stations and dynamic displacement waveforms of 15 stations using data from the Turkish national fixed global navigation satellite system (GNSS) network. A maximum static coseismic displacement of 0.38 m for the <em>M</em>_W7.8 Kahramanmaras earthquake was observed at station ANTE, 36 km from the epicenter, and a maximum dynamic coseismic displacement of 4.4 m for the <em>M</em>_W7.6 Elbistan earthquake was observed at station EKZ1, 5 km from the epicenter. The rupture-slip distributions of the two earthquakes were inverted using GNSS coseismic deformation as a constraint. The results showed that the Kahramanmaras earthquake rupture segment was distinct and exposed on the ground, resulting in significant rupture slip along the Amanos and Pazarcik fault segments of the East Anatolian Fault. The maximum slip in the Pazarcik fault segment was 10.7 m, and rupture occurred at depths of 0–15 km. In the Cardak fault region, the Elbistan earthquake caused significant ruptures at depths of 0–12 km, with the largest amount of slip reaching 11.6 m. The Coulomb stress change caused by the Kahramanmaras earthquake rupture along the Cardak fault segment was approximately 2 bars, and the area of increased Coulomb stress corresponded to the subsequent rupture region of the <em>M</em>_W7.6 earthquake. Thus, it is likely that the <em>M</em>_W7.8 earthquake triggered or promoted the <em>M</em>_W7.6 earthquake. Based on the cumulative stress impact of the <em>M</em>_W7.8 and <em>M</em>_W7.6 events, the southwestern segment of the East Anatolian Fault, specifically the Amanos fault segment, experienced a Coulomb rupture stress change exceeding 2 bars, warranting further attention to assess its future seismic hazard risk.</p></div>","PeriodicalId":46333,"journal":{"name":"Earthquake Science","volume":"37 3","pages":"Pages 263-276"},"PeriodicalIF":1.2,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674451924000430/pdfft?md5=be15cb26581f4bb64ae64e7cd50db3ff&pid=1-s2.0-S1674451924000430-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141235330","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}