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[1]YANG Wen,YU Huaizhong,ZHANG Xiaotao.Research on the Features of the Benioff Strain Ratio in Xinjiang Region before Earthquakes above MS6.0[J].Journal of Seismological Research,2025,(02):264-271.[doi:10.20015/j.cnki.ISSN1000-0666.2025.0028 ]

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Research on the Features of the Benioff Strain Ratio in Xinjiang Region before Earthquakes above M_S6.0

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: Number of periods: 2025 02 Page number: 264-271 Column: Public date: 2025-02-10

Title:: Research on the Features of the Benioff Strain Ratio in Xinjiang Region before Earthquakes above M_S6.0

Author(s):: YANG Wen; YU Huaizhong; ZHANG Xiaotao; (China Earthquake Networks Center,Beijing 100045,China)

Keywords:: Benioff strain ratio; Xinjiang region; minimum complete magnitude; earthquake prediction

CLC:: P315.7

DOI:: 10.20015/j.cnki.ISSN1000-0666.2025.0028

Abstract:: Before a strong earthquake occurs,the accelerated release of strain energy is common in the area near the epicenter,indicating that the seismogenic area is approaching or entering a critical state.Taking the Benioff strain as the response quantity,the Benioff strain ratio at different periods is calculated,which can be used as a parameter to characterize the speed of strain energy release,and its abnormal evolution reflects the high-stress state of the intermediate substance during seismic nucleation.The minimum complete magnitude is analyzed based on the earthquake catalog provided by the China Earthquake Networks Center,then the 90-day Benioff strain ratio before and after each month is calculated one year before the M_S6 earthquakes in Xinjiang since the year 2000.The results show that 14 of the 18 groups of earthquakes were located in the high-value anomaly region within one year. This passes the prediction effect test,indicating that the high-value anomaly of the Benioff strain ratio had significance for the medium- and short-term prediction of M_S6 earthquakes in Xinjiang region.One year before the Aketao M_S6.7 earthquake and the Hutubi M_S6.2 earthquake in 2016,the strain ratio in the seismogenic zone increased gradually,then decreased rapidly,and kept fluctuating stably.This may be related to the unstable nucleation of the fault.

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Last Update: 2025-03-10