15 June 2025, Volume 39 Issue 2

    

• Select all
  |

Wushi M_S 7.1 Earthquake on January 23,2024 Special Subject
• Select
  ANALYSIS OF EARLY WARNING PROCESSING OUTPUT AND PUBLISH FOR WUSHI M_S7.1 EARTHQUAKE

  LI Wen-qian, CHEN Xiang-jun, ZHAO Na, Gulimire Maimaiti, Zilalan Maihemuti, DONG Zhao-nan

  Inland Earthquake. 2025, 39(2): 107-112. https://doi.org/10.16256/j.issn.1001-8956.2025.02.001

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Post-earthquake early warning system of Wushi M_S7.1 earthquake produced four reports of earthquake early warning information, and pushed the first report of earthquake early warning service to the earthquake area at 12.2 s after the earthquake. By analyzing the output and release of earthquake early warning, it is found that the deviation between the epicenter position of the first report and the official result is the smallest, the deviation between the occurrence time of the second report and the third report and the official result is the smallest, and the deviation between the magnitude of the fourth report and the official result is the smallest. With the increasing number of early warning stations participating in the calculation, the magnitude of early warning is increasing, and the response level of some early warning terminals is increasing. The radius of the blind zone of the earthquake early warning is about 43 km, and the terminal response outside the blind zone is good, which effectively estimates the possible seismic damage of different field points.
  
• Select
  INVESTIGATION AND NVESTIGATION AND ANALYSIS OF BUILDING DAMAGE FROM WUSHI M_S7.1 EARTHQUAKE

  HOU Xin-yu, SUN Jing, Alimujiang Yalikun, ZHAO Peng-xiang, Batumengke, ZHANG Jin-yan

  Inland Earthquake. 2025, 39(2): 113-120. https://doi.org/10.16256/j.issn.1001-8956.2025.02.002

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Based on the damage of houses collected from 219 survey points in the field work of Wushi M_S7.1 earthquake, the characteristics of building damage in this earthquake are analyzed. The highest intensity of the earthquake area is IX degree, and the area above VI degree involves 6 counties and a corps field; the building types in the disaster area are mainly frame structure, brick-concrete structure and brick-wood structure, and the seismic damage characteristics of different structural types of houses in the disaster area are analyzed, in order to provide reference for the seismic design and construction of urban and rural houses in this area after the disaster.
  
• Select
  ANALYSIS OF SEISMIC ACTIVITY CHARACTERISTICS BEFORE WUSHI M_S7.1 EARTHQUAKE, XINJIANG ON JANUARY 23, 2024

  NIE Xiao-hong, XIANG Yuan, WEI Yun-yun

  Inland Earthquake. 2025, 39(2): 121-129. https://doi.org/10.16256/j.issn.1001-8956.2025.02.003

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  This paper briefly introduces the geological tectonic background around Wushi M_S7.1 earthquake in 2024, and analyzes the seismic activity status in the Xinjiang region and the characteristics of regional abnormal seismic activity before the M_S7.1 earthquake.The results show that: ① Before this earthquake, the seismic activity had well-matched characteristics of "long-term, medium-term, and short-term" anomalies, manifested as long-term background anomalies of strong earthquakes within 10 to 30 years, medium-term anomalies of moderately strong earthquakes within 1 to 3 years, and medium-short-term anomalies of small and moderate earthquakes about 0.5 years before the event; ② The spatial distribution characteristics of the pre-earthquake anomalies exhibited a pattern of "contraction" toward the earthquake area, manifested as a gradual contraction process from "Xinjiang and adjacent overseas areas" → "Xinjiang region" → "related tectonic areas or the vicinity of the earthquake area"; ③The pre-earthquake anomalous state transitioned from "single-type" to "diverse" with time. The anomalies of strong and moderately strong earthquakes were primarily characterized by "periodicity or quiescence", whereas small and moderate earthquake anomalies included various types such as seismic gaps, seismic belts, earthquake swarms, and frequency increases.
  
• Select
  ANALYSIS OF RTL ANOMALY CHARACTERISTICS BEFORE WUSHI M_S7.1 EARTHQUAKE

  Nilupaer Maimaitusun, LI Yue-shuai, ZHANG Lin-lin

  Inland Earthquake. 2025, 39(2): 130-138. https://doi.org/10.16256/j.issn.1001-8956.2025.02.004

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Using the RTL algorithm, the seismic activity changes before the Wushi M_S7.1 earthquake were quantitatively analyzed using the earthquake catalogue six years before the earthquake.The effects of different characteristic radius and magnitude lower limit Mmin on the V_RTL curve are analyzed respectively.The results show that the characteristic radius, magnitude lower limit and analysis period have a certain influence on the V_RTL calculation results.However, the abnormal changes of seismic activity enhancement can be detected before the Wushi M_S7.1 earthquake, and the anomalies show the change pattern of ‘rise-turn-fall’.The Wushi M_S7.1 earthquake occurred in the process of turning down after the anomaly reached the peak point.When r₀=60 km and M_min=M_S1.5, the anomaly duration is about 18 months.It provides a certain reference for understanding the seismogenic process and earthquake precursor research of the Wushi M_S7.1 earthquake.
  
• Select
  ANALYSIS OF COULOMB STRESS CHANGE BEFORE AND AFTER TWO EARTHQUAKES WITH MAGNITUDE ABOVE 7.0 IN XINJIANG AND ITS SURROUNDING AREAS

  ZHANG Lin-lin, GAO Chao-jun, SONG Chun-yan, Nilupaer Maimaitusun, CHEN Lu-Gang

  Inland Earthquake. 2025, 39(2): 139-145. https://doi.org/10.16256/j.issn.1001-8956.2025.02.005

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Analyze the coulomb stress variation and cumulative magnitude and its effects on the main faults by using the source parameter data of two strong earthquakes and the attribute characteristic value of the main faults in this region, based on the viscoelastic medium model. The analysis results show that: (1) The cumulative change of coulomb stress of the two strong earthquakes is mainly concentrated in the Kashi-Wuqia intersection area and Keping block. (2) The activities of the two strong earthquakes have increased stress effects on the faults of Kazkeaerte, Kembet, Aoyitake and Maidan. Then we should pay more attention to these areas.
  
• Select
  DISCUSSION ON AUTOMATIC PROCESSING RESULTS FOR AFTERSHOCK SEQUENCE OF WUSHI M_S 7.1 EARTHQUAKE

  ZHAO Na, RAN Hui-min, LI Wen-qian, Zilalan·Mahemuti, Gulimire·Maimaiti, DONG Zhao-nan

  Inland Earthquake. 2025, 39(2): 146-153. https://doi.org/10.16256/j.issn.1001-8956.2025.02.006

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  After Wushi M_S7.1 earthquake on January 23, 2024, the aftershock sequences 30 days after the earthquake were automatically detected using the RISP system, and the results of the automatic detection were compared and analyzed with the results of manual cataloging. The results show that 19432 earthquakes were automatically detected by the RISP system, and 4 887 earthquakes were matched with the manual catalog, of which the matching rate of M_L≥5.0 was 100%, the matching rate of M_L4.0～4.9 was 88.37%, the matching rate of M_L3.0～3.9 was 82.48%, the matching rate of M_L2.0～2.9 was 80.38%, and the matching rate of M_L≤2.0 was 74.85%. The large difference in epicenter was the main factor affecting the matching rate. For earthquake events that have been successfully matched, the time difference between the automatic and manual catalogs is mostly between -4 and 0 seconds, with a deviation of -1.33±1.03 seconds, an epicenter deviation of 10.15±6.47 km, and a depth deviation of 6.99±12.27 km; The magnitude deviation is -0.18±0.24. The system produces results quickly and has significant advantages in small earthquakes. The automatic aftershock results generated by earthquakes with M_L≥3.0 are basically in line with the expected purpose.
  
• Select
  ABNORMAL FEATURE ANALYSIS OF KAZAKHSTAN UNDERGROUND FLUID EXCHANGE DATA BEFORE WUSHI M_S7.1 EARTHQUAKE

  LIANG Hui, ZHAO Bin-bin, ZHANG Tao, TANG Li-hua

  Inland Earthquake. 2025, 39(2): 154-161. https://doi.org/10.16256/j.issn.1001-8956.2025.02.007

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Aiming at Wushi M_S7.1 earthquake on January 23,2024, the anomalies of underground fluid exchange data in Kazakhstan before the earthquake were sorted out and the temporal and spatial variation process was analyzed. The results show that there are five anomalies in the underground fluid exchange data of Kazakhstan before the Wushi earthquake, of which three are short-term anomalies, all of which appear three months before the earthquake. The anomaly is mainly located in the range of 200~500 km from the epicenter. The number of anomalies before the earthquake gradually increased, and the spatial and temporal changes of anomalies showed outward expansion and then contraction to the epicenter. Most of the anomalies before the earthquake are positive anomalies, and the research results are helpful to improve the understanding level of underground fluid precursor anomalies.
  
• Select
  STUDY ON WUSHI M_S7.1 EARTHQUAKE CO-SEISMIC STRESS EVOLUTION AND ITS INFLUENCE ON PERIPHERAL FAULTS

  Gulizinati Yideresi, Alimujiang Maimaitiyiming, FAN Ya-ling, Ma Qian-wen

  Inland Earthquake. 2025, 39(2): 162-168. https://doi.org/10.16256/j.issn.1001-8956.2025.02.008

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  Aiming at Wushi M_S7.1 earthquake on January 23,2024, the static Coulomb stress and the loading and unloading effect of the main faults are calculated. Combined with the spatial distribution of the remaining aftershocks, the stress triggering and its influence on the surrounding main faults are analyzed. The results show that: (1) Most of the aftershocks in the epicenter of Wushi M_S7.1 earthquake are densely distributed in the stress enhancement area near the fracture surface, and the aftershocks in the stress unloading area are less distributed. Part of the stress loading area on the fracture surface of the main shock further enhances the risk. (2) The stress loading effect of about 50 km in the Coulomb failure stress loading area is gradually released, and the aftershocks in the source earthquake area are densely distributed within 100～200 km and within a depth of 20 km. (3) According to the loading effect, the west section of Wusun ridge fault, the middle and east section of Kashi river fault, the east section of Keguqin fault, the middle section of Boa fault and the west section of Beiluntai fault are worthy of attention in space.
  
• Select
  WUSHI M_S7.1 EARTHQUAKE EMERGENCY MOBILE PLATFORM COMPONENTS AND EVALUATION

  Abudureyimujiang Bake, Wunier, MA Xin, Zulipiya Bake, ZHAO Xiaocheng, TIAN Bin-bin

  Inland Earthquake. 2025, 39(2): 169-174. https://doi.org/10.16256/j.issn.1001-8956.2025.02.009

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  After Wushi M_S7.1 earthquake, five emergency mobile seismic stations were set up near the epicenter to monitor the aftershock activity in the epicenter area with the surrounding seismic monitoring stations. The establishment, data transmission, data recording and aftershock recording of the mobile seismic station in this earthquake site are introduced. It shows that the mobile seismic station plays an important role in aftershock monitoring. The noise level of the mobile seismic station base is calculated, and it is confirmed that the erection environment of the mobile seismic station basically meets the erection requirements. This paper summarizes the experience of setting up the mobile seismic station, and provides suggestions for carrying out the mobile seismic observation work.
  
• Select
  ANALYSIS OF SOURCE CURRENT LOCATION OF TWO GEOMAGNETIC DAILY RATIO ANOMALIES IN WESTERN SECTION OF SOUTHERN TIANSHAN MOUNTAINS IN XINJIANG

  ZHANG An-he, Aisa Yisimayili, YANG Jie

  Inland Earthquake. 2025, 39(2): 175-180. https://doi.org/10.16256/j.issn.1001-8956.2025.02.010

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  In order to analyze the source of two geomagnetic daily ratio anomalies in the western part of the southern Tianshan Mountains in Xinjiang on December 10,2021 and November 27,2023, the current location of the two geomagnetic daily ratio anomalies was carried out, and its spatial relationship with the subsequent corresponding earthquakes was analyzed. The results show that:(1) There is no significant difference in the area enclosed by the threshold line and the current line between the two geomagnetic daily ratios. The three earthquakes are located at the end of the abnormal current line, and the distance between the earthquake and the current line is significantly smaller than the threshold line. (2) There is a significant negative correlation between the distance between the station and the abnormal current line and the geomagnetic daily ratio. (3) The ratio of the daily ratio of the station pairs corresponding to the current line endpoints with earthquakes is larger than that of the corresponding endpoints without earthquakes, that is, earthquakes may be more likely to occur between station pairs with large differences in daily ratios.
  
• Select
  RELATIONSHIP RESEARCH BETWEEN INSAR COSEISMIC DEFORMATION FIELD OF ASCENDING AND DESCENDING ORBITS: A CASE STUDY OF THRUST TYPE EARTHQUAKES IN XINJIANG

  WANG Shun, YAO Yuan, GAO Ming-xing

  Inland Earthquake. 2025, 39(2): 181-188. https://doi.org/10.16256/j.issn.1001-8956.2025.02.011

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  This study utilizes D-InSAR technology to process ascending and descending orbit data from the Sentinel-1 satellite, acquiring the line-of-sight (LOS) co-seismic deformation field of the 2016 Hutubi M_S6.2 earthquake and extracting the two-dimensional surface deformation information of Hutubi earthquake. The results indicate that the co-seismic deformation field from ascending and descending orbits displays more significant surface uplift than conspicuous subsidence deformation features. In addition, in order to further investigate the characteristics and spatial relations of InSAR co-seismic deformation field, the study results are compared with the co-seismic deformation fields of four thrust earthquakes, namely 2015 Pishan M_S6.5 earthquake, 2017 Jinghe M_S6.6 earthquake, 2020 Jiashi M_S6.4 earthquake and 2024 Wushi M_S7.1 earthquake. It is found that there is a specific spatial relationship between InSAR ascending and descending orbit and seismic deformation field. The research results can provide scientific basis for earthquake disaster assessment and earthquake emergency management departments to formulate risk prevention and disaster reduction measures.
  
• Select
  MAGNITUDE DIFFERENCES AND RELATED ORIGIN OF LOCAL AND REMOTE EARTHQUAKES RECORDED BY BOREHOLE AND GROUND SEISMOMETERS FOR KASHI MAIGAITI AND YUEPUHU STATIONS

  ZHAO Rui-sheng, WEI Zi-gen, Alimujiang Maimaitiyiming, LIU Yi-wei

  Inland Earthquake. 2025, 39(2): 189-196. https://doi.org/10.16256/j.issn.1001-8956.2025.02.012

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  In order to study the difference in the magnitude determination of seismic events by downhole and surface seismometers, the new national standard magnitude calculation formula was used to obtain a total of 289 near-earthquakes and 99 teleseismic magnitude differences obtained by surface and downhole seismometers at Kashgar Mageti Seismic Station and Yuepuhu Seismic Station. The results show that the average values of the near-seismic magnitude difference and the far-seismic surface wave magnitude difference at Maigaiti station are 0.264 and 0.023, respectively, and the average value of the near-seismic magnitude difference at Yuepuhu station is 0.476. The near-earthquake magnitude difference between Maigaiti and Yuepuhu stations decreases gradually with the increase of epicentral distance, but shows the opposite characteristics with the magnitude change trend. For the determination of near-earthquake magnitude, the magnitude measured by surface seismometer is larger than that measured by underground seismometer, and the magnitude measured by underground seismometer is closer to the magnitude of seismic events. For teleseism, the magnitude measured by surface seismometer is not much different from that measured by underground seismometer.
  
• Select
  RELATIONSHIP BETWEEN WATER LEVEL ANOMALIES AND POROSITY VARIATIONS IN NEW 32 WELL

  JING Xiao-fu, LIU Yan-hui, WANG Guo-dong, XING Shao-zhi, YANG Bin, WANG Ji-li

  Inland Earthquake. 2025, 39(2): 197-202. https://doi.org/10.16256/j.issn.1001-8956.2025.02.013

  Abstract ( ) Download PDF ( )   Knowledge map   Save

  In view of the rapid 'up-down' abnormal change of the observation data curve of the water level of Xin32 well in Xinjiang Bole from 2019 to 2020, the porosity of the aquifer medium of Xin32 well under undrained condition is obtained by calculating the parameters such as air pressure coefficient and tidal factor based on the observation data of water level and atmospheric pressure of the observation well. By studying the variation characteristics of the porosity value of the well-aquifer system of the new 32 well under different conditions, the hydrodynamic reasons for the abnormal change of the water level observation data curve are analyzed. The results show that the abnormal change of water level observation data in Xin 32 well is less correlated with stress change, which is related to the increase of recharge caused by the change of aquifer medium.