Geodynamic and Seismotectonic Activity in Eastern Tibet in the 21st Century
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At the beginning of the 21st century, a series of great earthquakes were recorded in northeastern Tibet, along the periphery of the Bayan Hara lithospheric block. An earthquake with MS = 8.1 occurred within the East Kunlun fault zone in the Kunlun Mountains, which caused an extended surface rupture with left-lateral strike slip. An earthquake with MS = 8 occurred in Wenchuan (China) on May 12, 2008, giving rise to an extended overthrust along the Lunmanshan fault zone. An earthquake with MS = 7.1 occurred in Yushu (China) on April 14, 2010; its epicenter was on the Grazze–Yushu–Funchuoshan fault; a left-lateral strikeslip offset was observed on the surface. An earthquake with MS = 7 occurred in the vicinity of Lushan on April 20, 2013; its epicenter was within the Lunmanshan fault zone, 103 km southwest of the zone of the catastrophic Wenchuan earthquake. An earthquake with MS = 8.2 occurred in Nepal on April 25, 2015. Based on the CSN seismic catalog, the energy of all earthquakes in eastern Tibet at the end of the 20th and beginning of the 21st centuries was estimated. It was found that Tibet was seismically quiet from 1980 to 2000. The beginning of the 21st century has been marked by seismic activation with earthquake sources migrating southward to surround the Bayan Hara lithospheric block from every quarter. Therefore, this block can be regarded as one of the most seismically active regions of China.
KeywordsBayan Hara block Himalayas northeastern Tibet epicenter earthquake migration seismic rupture
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- Artyushkov, E.V. and Chekhovich, P.A., Mechanisms of recent crustal uplifts in the Phanerozoic and Precambrian fold belts, in Materialy XLVI Tektonicheskogo soveshchaniya “Tektonika skladchatykh poyasov Evrazii: Skhodstvo, razlichie, kharakternye cherty noveishego goroobrazovaniya, regional’nye obobshcheniya” (“Tectonics of the Eurasian Fold Belts: Similarities, Differences, Characteristic Features of Recent Orogeny, and Regional Generalization.” Proceedings of the XLVI Meeting on Tectonics), Moscow: GEOS, 2014, vol. 1, pp. 3–6.Google Scholar
- Burchfiel, B.C., Royden, L.H., van der Hilst, P.O., Hager, B.H., Chen, Z., King, R.W., Li, G., Lu, J., Yao, H., and Kirby, E., A geological and geophysical context for theWenchuan earthquake of 12 May 2008, Sichuan, People’s Republic of China, GSA Today, 2008, vol. 18, no. 7, pp. 4–11.Google Scholar
- Chandra, U., Seismotectonics of Himalaya, Current Sci., 1992, vol. 62, pp. 40–71.Google Scholar
- Cheloni, D., Coseismic slip model of the M 7.8 2015 Nepal earthquake and its M 7.2 aftershock from joint inversion of InSAR and GPS data, 2015. doi 10.13140/RG.2.1.3263.4720Google Scholar
- Chen Yun-tai, Xu Li-sheng, and Zhang Yong, Report on the Great Wenchuan earthquake source of May 12, 2008.Google Scholar
- Deng Qidong, Gao Xiang, Chen Guihua, et al., Recent tectonic activity of Bayankala fault-block and the Kunlun–Wenchuan earthquake series of the Tibetan Plateau, Earth Sci. Front., 2010, vol. 17, no. 5, pp. 163–178.Google Scholar
- Densmore, A., Dijkstra, T., Jordan, C., et al., Nepal: Update on landslide hazard following 12 May 2015 earthquake, 2015. https://doi.org/ewf.nerc.ac.uk/2015/05/12/nepal-update-on-landslidehazard-following-12-may-2015-earthquake/. Accessed April 1, 2018.Google Scholar
- Engdahl, E.R. and Villaseñor, A., Global seismicity: 1900–1999, in International Handbook of Earthquake and Engineering Seismology, vol. 81, Pt. A of International Geophysics, Lee, W.H.K., Kanamori, H., Jennings, P.C., and Kisslinger, C., Eds., Academic Press, 2002, pp. 665–690. doi https://doi.org/10.1016/S0074-6142(02)80244-3 CrossRefGoogle Scholar
- Fu Bihong, Wang Ping, Kong Ping, Shi Pilong, and Zheng Guodong, Atlas of Seismological and Geological Disasters Associated with the 12 May 2008, MS 8.0 Wenchuan Great Earthquake, Sichuan, China, Beijing: Seismol. Press, 2009.Google Scholar
- Gansser, A., The morphogenic phase of mountain building, in Mountain Building Process, Hsu, K.J., Ed., London: Academic Press, 1982, pp. 221–228.Google Scholar
- Geophysical Survey of the Russian Academy of Sciences, Last earthquakes. https://doi.org/www.ceme.gsras.ru/new/eng/ssd_news.htm. Accessed April 1, 2018. Global Centroid-Moment-Tensor Project. http://www. globalcmt.org. Accessed April 1, 2018.
- Li Dewei, The regularity and mechanism of East Kunlun, Wenchuan and Yushu earthquakes and discussion on genesis and prediction of continental earthquakes, Earth Sci. Front., 2010, vol. 17, no. 5, pp. 179–192.Google Scholar
- Liu Yanqiong, Zhao Jisheng, and Liu Peixuan, GPS-based analysis of large earthquakes sequence on active faults near Chuanqing block, J. Nat. Disasters, 2015, vol. 4, no. 3, pp. 58–66.Google Scholar
- Lombardi, A.M. and Marzocchi, W., Evidence of clustering and nonstationarity in the time distribution of large worldwide earthquakes, J. Geophys. Res.: Solid Earth, 2007, vol. 112. doi 10.1029/2006JB004568Google Scholar
- Milanovskii, E.E., Osnovnye etapy riftogeneza na territorii Kitaya (Main Stages of Rifting in the Territory of China), Moscow: Nedra, 1991.Google Scholar
- Ran, Y.K., Chen, L.C., Chen, G.H., et al. Primary analyses of in-situ recurrence of large earthquake along seismogenic fault of the MS = 8.0 Wenchuan earthquake, Seismol. Geol., 2008, vol. 30, no. 3, pp. 630–643.Google Scholar
- Rogozhin, E.A., Lutikov, A.I., Sobisevich, L.E., To Shen, and Kanonidi, K.Kh., The Gorkha earthquake of April 25, 2015 in Nepal: Tectonic position, aftershock process, and possibilities of forecasting the evolution of seismic situation, Izv., Phys. Solid Earth, 2016b, vol. 52, no. 4, pp. 534–549.CrossRefGoogle Scholar
- Sobisevich, L.E., Rogozhin, E.A., Sobisevich, A.L., To Shen, and Ziao Liu, Instrumental observations of geomagnetic disturbances prior to seismic evens in several regions of China, Seism. Instrum., 2017, vol. 53, no. 1, pp. 28–45.Google Scholar
- Tapponnier, P., Peltzer, G., and Armijo, R., On the mechanics of the collision between India and Asia, in Collision Tectonics, Vol. 19 of Geol. Soc. London, Spec. Publ., Ed. by Coward, M.P. and Ries, A.C. (London, 1986), pp. 115–157.Google Scholar
- USGS Earthquake Hazards Program. https://doi.org/earthquake.usgs.gov. Accessed April 1, 2018. USGS, Search earthquake catalog. http://earthquake. usgs.gov/earthquakes/search/. Accessed April 1, 2018.
- Van der Woerd, J., Klinger, Y., Tapponnier, P., Xu, X., Chen, W., Ma, W., and King, G., Coseismic offsets and style of surface ruptures of the 2001 Mw = 7.8 Kokoxili earthquake (Northern Tibet), EGS-AGU-EUG Joint Assembly, Nice, France, 2003, Abstr. ID 11151.Google Scholar
- Wei Wei, Dapeng Zhao, Xu Jiandong, Zhou Bengang, and Yaolin Shi, Depth variations of P-wave azimuthal anisotropy beneath Mainland China, Sci. Rep., 2016, vol. 6. doi doi 10.1038/srep29614Google Scholar
- Xu Xiwei, Chen Guihua, Yu Guihua, et al., Seismogenic structure of Lushan earthquake and its relationship with Wenchuan earthquake, Earth Sci. Front., 2013, vol. 20, no. 3, pp. 11–20.Google Scholar
- Xu Xi-wei, Wen Xue-ze, Ye Jian-qing, et al., The MS = 8.0 Wenchuan earthquake surface ruptures and its seismogenic structure, Seismol. Geol., 2008, vol. 30, no. 3, pp. 597–629.Google Scholar