PDF(4045 KB)
The Stress Triggering of the 2025 Dingri, Xizang, China M W6.8 Earthquake by the 2015 Nepal M W7.8 and M W7.2 Earthquakes
Jin Zhitong, Zhou Mingyue, Huang Jichao, Wan Yongge
PDF(4045 KB)
PDF(4045 KB)
The Stress Triggering of the 2025 Dingri, Xizang, China M W6.8 Earthquake by the 2015 Nepal M W7.8 and M W7.2 Earthquakes
,
The stress triggering of the 2015 Nepal M W7.8 and M W7.2 earthquakes on the 2025 Dingri M W6.8 earthquake and its seismogenic fault are analyzed and discussed in this study, based on the rupture models of the two Nepal earthquakes and a layered viscoelastic crustal velocity model. The results show follows：(1) The 2015 Nepal M W7.8 earthquake caused a Coulomb stress change of 0.003 9 MPa at the source location of the Dingri earthquake, which was significantly greater than the stress modulation caused by solid tides, indicating that it played a promoting role in the occurrence of the Dingri earthquake. The combined Coulomb stress changes from the 2015 Nepal M W7.8 and M W7.2 earthquakes at the source location of the Dingri earthquake amounted to 0.010 4 MPa, exceeding the seismic stress triggering threshold of 0.01 MPa, suggesting that the joint effect of the two earthquakes significantly promoted the occurrence of the Dingri earthquake. (2) During the Dingri earthquake, both the M W7+ earthquakes caused positive Coulomb stress changes on its seismogenic fault plane, with an average Coulomb stress change of 8 837 Pa. Especially at the source of the Dingri earthquake, the Coulomb stress change exceeded the stress triggering threshold of 0.01 MPa, indicating that the two earthquakes effectively increased the stress level on the seismogenic fault plane of the Dingri earthquake, having a significant triggering effect on the source location of the Dingri earthquake. (3) Considering the two M W7+ earthquakes in 2015, along with the two M S5.9 earthquakes in Dingri in 2015 and 2020, it was found that the 2015 Dingri earthquake had a suppressing effect on the Dingri earthquake, while the 2020 M S5.9 Dingri earthquake had a promoting effect. The combined Coulomb stress changes from these four earthquakes amounted to 0.01 MPa, which triggered the Dingri earthquake. The results of this study provide basic data and information for understanding the seismic hazard analysis of the fault where the Dingri earthquake occurred, with significance for the seismic activity at the boundary of the Indian Plate and the Eurasian Plate, as well as the tectonic evolution of the Tibetan Plateau.
Nepal / Dingri,Xizang,China / earthquake / rupture model / Coulomb stress change / stress triggering / tectonics
|
Chen, Y. T., Lin, B. H., Lin, Z. Y., et al., 1975. The Focal Mechanism of the 1966 Hsingtai Earthquake as Inferred from the Ground Deformation Observations. Chinese Journal of Geophysics, 18(3): 164-182 (in Chinese with English abstract).
|
|
Chinnery, M. A., 1963. The Stress Changes That Accompany Strike-Slip Faulting. The Bulletin of the Seismological Society of America, 53(5): 921-932. https://doi.org/10.1785/BSSA0530050921
|
|
Fang, J. L., Zhao, B., Yu, J. S., et al., 2022. Research on the Seismic Source Model and Static Stress Triggering of the 2015 Dingri M W5.7 Earthquake. Journal of Geodesy and Geodynamics, 42(9): 964-970 (in Chinese with English abstract).
|
|
Freed, A. M., Lin, J., 2001. Delayed Triggering of the 1999 Hector Mine Earthquake by Viscoelastic Stress Transfer. Nature, 411(6834): 180-183. https://doi.org/10.1038/35075548
|
|
Gao, Y., Wu, Z. H., Zuo, J. M., et al., 2024. Spatial-Temporal Activity of Quaternary Faults at Southern End of Nyalam-Coqen Rift, Southern Tibet. Earth Science, 49(7): 2552-2569 (in Chinese with English abstract).
|
|
Hardebeck, J. L., Nazareth, J. J., Hauksson, E., 1998. The Static Stress Change Triggering Model: Constraints from Two Southern California Aftershock Sequences. Journal of Geophysical Research: Solid Earth, 103(B10): 24427-24437. https://doi.org/10.1029/98JB00573
|
|
Harris, R. A., 1998. Introduction to Special Section: Stress Triggers, Stress Shadows, and Implications for Seismic Hazard. Journal of Geophysical Research: Solid Earth, 103(B10): 24347-24358. https://doi.org/10.1029/98JB01576
|
|
Jin, Z. T., Cui, H. W., Liu, J. L., et al., 2023. Impact of Two Strong Earthquakes in Turkey in 2023 on the Static Stress in the Surrounding Areas of the Epicenters. Journal of Institute of Disaster Prevention, 25(2): 1-12 (in Chinese with English abstract).
|
|
Jin, Z. T., Wan, Y. G., Liu, Z. C., et al., 2019. The Static Stress Triggering Influences of the 2017 M S7.0 Jiuzhaigou Earthquake on Neighboring Areas. Chinese Journal of Geophysics, 62(4): 1282-1299 (in Chinese with English abstract).
|
|
Jin, Z. T., Wan, Y. G., Wang, F. C., et al., 2024. Research on the Fault Geometry and Slip Characteristics of Lushan Earthquake Sequence in 2013 and 2022. Chinese Journal of Geophysics, 67(6): 2202-2219 (in Chinese with English abstract).
|
|
Jónsson, S., Segall, P., Pedersen, R., et al., 2003. Post-Earthquake Ground Movements Correlated to Pore-Pressure Transients. Nature, 424(6945): 179-183. https://doi.org/10.1038/nature01776
|
|
King, G. C. P., Stein, R. S., Lin, J., 1994. Static Stress Changes and the Triggering of Earthquakes. Bulletin of the Seismological Society of America, 84(3): 935-953. https://doi.org/10.1785/BSSA0840030935
|
|
Laske, G., Masters, G., Ma, Z. T., et al., 2013. Update on CRUST1.0-A1-Degree Global Model of Earth’s Crust. European Geosciences Union General Assembly 2013, Vienna.
|
|
Li, Q., Li, C. T., Zhao, B., et al., 2024. Estimated Seismic Source Parameters for 2020 Dingri M w 5.6 Earthquake in Xizang and Study on the Stress Triggering. 67(1): 172-188 (in Chinese with English abstract).
|
|
Li, Y. J., Chen, L. W., Lu, Y. Z., et al., 2013. Numerical Simulation on Influences of Wenchuan Earthquake on the Stability of Faults in the Neighborhood. Earth Science, 38(2): 398-410 (in Chinese with English abstract).
|
|
Liu, C., Dong, P. Y., Zhu, B. J., et al., 2018. Stress Shadow on the Southwest Portion of the Longmen Shan Fault Impacted the 2008 Wenchuan Earthquake Rupture. Journal of Geophysical Research: Solid Earth, 123(11): 9963-9981. https://doi.org/10.1029/2018JB015633
|
|
Okada, Y., 1992. Internal Deformation Due to Shear and Tensile Faults in a Half-Space. The Bulletin of the Seismological Society of America, 82(2): 1018-1040. https://doi.org/10.1785/BSSA0820021018
|
|
Rydelek, P. A., Sacks, I. S., 1990. Asthenospheric Viscosity and Stress Diffusion: A Mechanism to Explain Correlated Earthquakes and Surface Deformations in Ne Japan. Geophysical Journal International, 100(1): 39-58. https://doi.org/10.1111/j.1365-246X.1990.tb04566.x
|
|
Shan, B., Zheng, Y., Liu, C. L., et al., 2017. Coseismic Coulomb Failure Stress Changes Caused by the 2017 M7.0 Jiuzhaigou Earthquake, and Its Relationship with the 2008 Wenchuan Earthquake. Scientia Sinica (Terrae), 47(11): 1329-1338 (in Chinese).
|
|
Shen, Z. K., Wan, Y. G., Gan, W. J., et al., 2003. Viscoelastic Triggering among Large Earthquakes along the East Kunlun Fault System. Chinese Journal of Geophysics, 46(6): 786-795 (in Chinese with English abstract).
|
|
Sheng, S. Z., Wan, Y. G., Jiang, C. S., et al., 2015. Preliminary Study on the Static Stress Triggering Effects on China Mainland with the 2015 Nepal M S8.1 Earthquake. Chinese Journal of Geophysics, 58(5): 1834-1842 (in Chinese with English abstract).
|
|
Sheng, S. Z., Wang, Q. R., Li, Z. Y., et al., 2025. Investigation of the Seismogenic Structure of the 2025 Dingri M S6.8 Earthquake in Xizang Based on the Tectonic Stress Field Perspective. Seismology and Geology, 47(1): 49-63 (in Chinese with English abstract).
|
|
Shi, Y. L., Cao, J. L., 2008. Effective Viscosity of China Continental Lithosphere. Earth Science Frontiers, 15(3): 82-95 (in Chinese with English abstract).
|
|
Stein, R. S., 1999. The Role of Stress Transfer in Earthquake Occurrence. Nature, 402(6762): 605-609. https://doi.org/10.1038/45144
|
|
Wan, Y. G., 2016. Introduction to Seismology. Science Press, Beijing, 195-253 (in Chinese).
|
|
Wan, Y. G., 2019. Determination of Center of Several Focal Mechanisms of the Same Earthquake. Chinese Journal of Geophysics, 62(12): 4718-4728 (in Chinese with English abstract).
|
|
Wan, Y. G., Sheng, S. Z., Li, X., et al., 2015. Stress Influence of the 2015 Nepal Earthquake Sequence on Chinese Mainland. Chinese Journal of Geophysics, 58(11): 4277-4286 (in Chinese with English abstract).
|
|
Wan, Y. G., Wu, Z. L., Zhou, G. W., 2003. Small Stress Change Triggering a Big Earthquake: A Test of the Critical Point Hypothesis for Earthquakes. Chinese Physics Letters, 20(9): 1452-1455.
|
|
Wan, Y. G., Wu, Z. L., Zhou, G. W., et al., 2000. “Stress Triggering” between Different Rupture Events in Several Complex Earthquakes. Acta Seismologica Sinica, 22(6): 568-576 (in Chinese with English abstract).
|
|
Wang, R. J., Lorenzo-Martín, F., Roth, F., 2006. PSGRN/PSCMP—A New Code for Calculating Co- and Post-Seismic Deformation, Geoid and Gravity Changes Based on the Viscoelastic-Gravitational Dislocation Theory. Computers & Geosciences, 32(4): 527-541. https://doi.org/10.1016/j.cageo.2005.08.006
|
|
Wessel, P., Smith, W. H. F., 1998. New, Improved Version of Generic Mapping Tools Released. Eos, Transactions American Geophysical Union, 79(47): 579. https://doi.org/10.1029/98EO00426
|
|
Xiao, Y., Shan, B., Liu, C. L., et al., 2024. Stress Triggering and Seismic Hazard Assessment of the 2022 Lushan M S6.1 Earthquake. Earth Science, 49(8): 2979-2991 (in Chinese with English abstract).
|
|
Yagi, Y., Okuwaki, R., 2015. Integrated Seismic Source Model of the 2015 Gorkha, Nepal, Earthquake. Geophysical Research Letters, 42(15): 6229-6235. https://doi.org/10.1002/2015GL064995
|
|
Yang, Q., Dang, Y. M., 2010. A Research about Effective Viscosity of Tibetan Plateau Lithosphere Viscoelastic Ductile Layer Using GPS Velocity Fields. Acta Geodaetica et Cartographica Sinica, 39(5): 497-502 (in Chinese with English abstract).
|
|
Yang, T., Wang, S. G., Fang, L. H., et al., 2025. Analysis of Earthquake Sequence and Seismogenic Structure of the 2025 M S6.8 Dingri Earthquake in Tibetan Plateau. Earth Science, 50(5): 1721-1732 (in Chinese with English abstract).
|
|
Zhang, X. T., Jiang, X. H., Xue, Y., et al., 2020. Summary of the Dingri M S5.9 Earthquake in Tibet on March 20, 2020. Seismological and Geomagnetic Observation and Research, 41(4): 193-203 (in Chinese with English abstract).
|
|
Zhou, J. C., Sun, H. P., Xu, J. Q., et al., 2013. Tidal Strain and Tidal Stress in the Earth’s Interior. Chinese Journal of Geophysics, 56(11): 3779-3787 (in Chinese with English abstract).
|
本文图件是利用Generic Mapping Tools（Wessel and Smith，1998）绘制的.对USGS提供地震破裂模型表示感谢.对汪荣江教授提供的PSGRN/PSCMP软件包表示感谢.对两位审稿专家提出的建设性的意见表示由衷的感谢，这使得本文有了质的提升！
/
| 〈 |
|
〉 |
AI Summary
