Abstract
Seismicity and slip rates along the Lijiang-Ninglang fault zone between 1999 and 2006 were investigated with the waveform data recorded by the Yunnan digital Seismic Network. The relocated seismicity by the double difference method clearly exhibits different features between the northern and southern segments. More than 76% earthquakes occurred in the southern segment of the fault near the Lijiang area. The relocated seismicity appears to reflect the crustal velocity structure of the study area. Using cross-correlation analysis, we identified a total of 92 doublets and 70 multiplets that show high waveform similarity. Most of these sequences are aperiodic with recurrence intervals varying from a few minutes to hundreds of days. Using two sequences that occurred regularly over the study period, we obtained a fault slip rate of approximately 5 mm/a at ∼23 km, in good agreement with geologic and surface GPS measurement.
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References
Xu X W, Wen X Z, Zhen R Z, et al. Pattern of latest tectonics motion and its dynamics for active blocks in Sichuan-Yunnan region, China. Sci China Ser D-Earth Sci, 2003, 46(Suppl): 210–226
Xiang H F, Xu X W, Gou S M, et al. Sinistral thrusting along the Lijiang-Xiaojinhe fault since Quaternary and its geologic-tectonic significance (in Chinese). Seismol Geol, 2002, 24(2): 188–198
Zhang P Z, Wang M, Gan W J, et al. Slip rates along major active faults from GPS measurements and constraints on contemporary continental tectonics (in Chinese). Earth Sci Front, 2003, 10(Suppl): 81–92
Sun J B, Xu X W, Shi Y L, et al. The co-seismic deformation field inferred from INSAR measurements and estimation of fault slip rate along the Mani segment of East Kunlun fault (in Chinese). Prog Nat Sci, 2007, 17(10): 1361–1370
Nadeau R M, Foxall W, McEvilly T V. Clustering and periodic recurrence of microearthquakes on the San Andreas fault at Parkfield, California. Science, 1995, 267: 503–507, doi: 10.1126/science.267.5197.503
Nadeau R M, McEvilly T V. Fault slip rates at depth from recurrence intervals of repeating microearthquakes. Science, 1999, 285: 718–721, doi: 10.1126/science.285.5428.718
Schaff D P, Richards P G. Repeating seismic events in China. Science, 2004, 303: 1176–1178, doi: 10.1126/science.1093422
Li L, Chen Q F, Cheng X, et al. Spatial clustering and repeating of seismic events observed along the 1976 Tangshan fault, north China. Geophys Res Lett, 2007, 34: L23309, doi: 10.1029/2007GL031594
Zhang P Z, Deng Q D, Zhang Q M, et al. Active tectonic blocks and strong earthquakes in the continent of China. Sci China Ser D-Earth Sci, 2003, 46(Suppl): 13–24
Waldhauser F, Ellsworth W L. A double-difference earthquake location algorithm: Method and application to the northern Hayward fault, California. Bull Seismol Soc Am, 2000, 90: 1353–1368, doi: 10.1785/0120000006
Yang Z X, Yu X W, Zhen Y J, et al. Earthquake relocation and three-dimensional crustal structure of P-wave velocity in central-western China. Acta Seismol Sin, 2004, 17(1): 20–30
Xiong S B, Zheng Y, Yin Z X, et al. The 2-D structure and its tectonic implications of the crust in the Lijiang-Panzhiha-Zhehai region (in Chinese). Chin J Geophys, 1993, 36(4): 434–444
Lin Z Y, Hu H X, Zhang W B, et al. The preliminary interpretation of deep seismic sounding in western Yunnan. Acta Seismol Sin, 1993, 6(4): 867–881
Institute of Geology, China Earthquakes Administration, Yunan Earthquake Administration. The Active Faults in Northwest Yunnan Region (in Chinese). Beijing: Seismological Press, 1990
Huang J L, Zhao D P, Zheng S H. Lithopheric structure and its relationship to seismic and volcanic activity in Southwest China. J Geophys Res, 2002, 107(B10), 2255, doi: 10.1029/2000JB000137
Zhu A L, Xu X W, Zhou Y S, et al. Relocation of small earthquakes in western Sichan, China and its implications for active tectonics (in Chinese). Chin J Geophys, 2005, 48(3): 629–636
Hanks T C, Kanamori H. A moment magnitude scale. J Geophys Res, 1979, 84: 2348–2350
Kanamori H, Anderson D L. Theoretical basis for some empirical relations in seismology. Bull Seism Soc Am, 1975, 65: 1073–1095
Cheng X, Niu F L, Silver P, et al. Similar microearthquakes observed in western Nagano, Japan, and implications for rupture mechanics. J Geophys Res, 2007, 112: 1–13, doi: 10.1029/2006JB004416
Rubin A M, Gillard D. Aftershock asymmetry/rupture directivity among central San Andreas fault microearthquakes. J Geophys Res, 2000, 105: 19095–19109, doi: 10.1029/2000JB900129
Shen J, Wang Y P, Ren J W. The Quaternary right-lateral strike-slipping Deqin-Zhongdian-Daju fault in Yunnan, China (in Chinese). Study on the Recent Deformation and Dynamics of the Lithosphere of Qinghai-Tibet Plateau (3). Beijing: Seismological Press, 2001. 123–135
Shen Z K, Lü J N, Wang M, et al. Contemporary crustal deformation around the southeast borderland of the Tibetan Plateau. J Geophys Res, 2005, 110, B11409, doi: 10.1029/2004JB003421
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Supported by National Basic Research Program of China (Grant No. 2004CB418405) and National Natural Science Foundation of China (Grant No. 40174014)
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Li, L., Chen, Q., Niu, F. et al. Slip rate along the Lijiang-Ninglang fault zone estimated from repeating microearthquakes. Chin. Sci. Bull. 54, 447–455 (2009). https://doi.org/10.1007/s11434-008-0406-2
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DOI: https://doi.org/10.1007/s11434-008-0406-2