Source parameters of the 2023 M_(L) 6.4 Jajarkot earthquake in the western Nepal seismic gap zoneOA
The 2023 local magnitude(M_(L))6.4 Jajarkot earthquake was the most destructive event to occur in the source region of the 1505 M_(W)8.2 Lo Mangthang Mustang earthquake in western Nepal.Here we used local seismic stations deployed in Nepal and southern China,and teleseismic stations with depth phase records to study the earthquake relocation and source rupture process.The Jajarkot earthquake was relocated to an epicenter at 28.828°N,82.110°E and a focal depth of 13 km.The fault plane solution showed a thrust fault earthquake with a north-dipping angle of 21°.The released seismic moment was 3.88×10^(17)N·m,corresponding to a moment magnitude(M_(W))of 5.7.The rupture area was 25 km along the strike and 20 km along the dip.The rupture nucleated on the ramp structure of the main Himalayan thrust and propagated to shallower depths,causing severe damage to the surrounding region.This study provides new insights into the local geometry of the main Himalayan thrust within the seismic gap zone in western Nepal.
Sanjev Dhakal;Ling Bai;Bowen Song;Guohui Li;Md.Moklesur Rahman;Hui Su;Zhiwen Chen;Shaojun Wang;Hongru Li;Li Li
State Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China University of Chinese Academy of Sciences,Beijing 100049,ChinaGeophysical Exploration Center,China Earthquake Administration,Zhengzhou 450003,ChinaKey Laboratory of Earthquake Prediction,Institute of Earthquake Forecasting,China Earthquake Administration,Beijing 100036,ChinaState Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China Department of Petroleum and Mining Engineering,Jashore University of Science and Technology,Jashore 7408,BangladeshHebei Earthquake Agency,Shijiazhuang 050000,ChinaState Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China University of Chinese Academy of Sciences,Beijing 100049,ChinaState Key Laboratory of Tibetan Plateau Earth System,Environment and Resources(TPESER),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China University of Chinese Academy of Sciences,Beijing 100049,ChinaInstitute of Geophysics,China Earthquake Administration,Beijing 100081,China
天文与地球科学
2023 Jajarkot earthquakeMain Himalayan Thrustseismic observationearthquake relocationsource rupture process
《Earthquake Science》 2026 (3)
P.273-285,13
supported by the National Natural Science Foundation of China(No.42130312)the Alliance of International Science Organizations(ANSO)scholarship for international PhD students.
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