Abstract
Based on high-rate (1 Hz) GPS data from the Sichuan GPS Continuous Observation Network on the footwall of the Longmenshan Fault, we have characterized the near-field surface movement process during the 5.12 Wenchuan Earthquake. Results show that the maximum deformation near the fault is larger than the deformation set. Stations on the northern segment of the fault moved towards the epicenter first, and then turned toward the vertical orientation of the fault. Deformation of stations on the southern segment is smaller and recovered. The initial motion at all of the stations was downward followed by periodic up and down movements. Comparing the displacement from high-rate GPS and accelerograph data, we can see that they are consistent prior to the arrival of the principal shock, but afterwards a 10 cm difference is found, even though they are synchronized and in phase. More work is yet to be done to explain this. This is the first time that actual the real near-field surface movements of an earthquake of M >7.0 have been determined in china. These measurements are therefore of high value for studies of surface rupture processes and the analysis of seismic wave travels paths in this region.
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References
Liu Q Y, Chen J H, Li S C, et al. The M s8.0 Wenchuan Earthquake: preliminary results from the Western Sichuan mobile sesmic arry observations (in Chinese). Seismol Geol, 2008, 30: 584–596
The Project Group of National Improtant Project on Science “The Crustal Movement Observation Network of China”, Coseismic displacement of Wenchuan M s8.0 Earthquake in 2008 observed by GPS (in Chinese). Sci China Earth Sci, 2008, 38: 1195–1206
Zhang P Z, Xu X W, Wen X Z, et al. Slip rates and recurrence intervals of the Longmenshan active fault zone, and tectonic implications for the mechanism of the May 12 Wenchuan earthquake 2008 Sichuan, China (in Chinese). Chin J Geophys, 2008, 51: 1066–1073
Xu X W, Wen X Z, Ye J Q, et al. The M s8.0 Wenchuan Earthquake surface ruptures and its seismogenic structure (in Chinese). Seismol Geol, 2008, 30: 597–629
Wang W M, Zhao L F, Li J, et al. Rupture of the M s8.0 Wenchuan earthquake of Sichuan, China (in Chinese). Chin J Geophys, 2008, 51: 1403–1410
Yin H T, Gan W J, Xiao G R, et al. Progress on monitoring strong earthquake ground motions using high-rate GPS (in Chinese). Prog Geophys, 2009, 24: 2012–2019
Kristine M L, Paul B, Joan G. Using 1-Hz GPS data to measure deformations caused by the Denali Fault Earthquake. Science, 2003, 1421–1424
Bock Y, Prawirodirdjo L, Melboume T. Detection of arbitrarily large dynamic ground motions with a dense high-rate GPS network. Geophy Res Lett, 2004, 31, L06604, doi: 10.1029/2003GL01950
Miyazaki S, Laeson K, Choi K, et al. Modeling the rupture process of the 2003 Septempter 25 Tokachi-Oki (Hokkaido) earthquake using 1-Hz GPS data. Geophys Res Lett, 2004, 31, L21603, doi:10.1029/2004GL021457
Emore G J, Haase Choi K, et al. Recovering absolute sesmic displacements through combined use of 1-Hz GPS and strong motion accelerometers. Bull Seismol Soc Am, 2007, 97: 357–378
Ji C, Larson M, Tan Y, et al. Slip history of the 2003 San Simon earthquake constrained by combining 1-Hz GPS, strong motion, and teleseismic data. Geophys Res Lett, 2004, 31, L17068, doi: 10.1029/2004GL020448
Wang G, Boore D M, Tang G, et al. Comparisons of Ground motions from collocated and closely spaced one-sample-per-second Global Position System and accelerograph recordings of the 2003 M6.5 San Simeon, California earthquake in the Parkfield region. Bull Seismol Soc Am, 2007, 97: 76–90
Ohta Y, Meiano I, Sagiya T, et al. Large surface wave of the 2004 Sumatra-Andaman earthquake captured by the very long baseline kinematic analysis of 1-Hz GPS data. Earth Planet Space, 2006, 58: 153–157
Choi K, Bilich A, Larson K M, et al. Modified sidereal filtering: implication for high-rate GPS positioning. Geophys Res Lett, 2004, 31, L24610, doi: 10.1029/2004GL021621
Zhang P Z. Recent tectonic deformation, strain partitioning and deep dynamic processes in the eastern margin of Tibetan Plateau, western Sichuan area (in Chinese). Sci China Earth Sci, 2008, 38: 1–15
King R W, Bock Y. Documentation for the GAMIT GPS Analysis Software, Release 10.2. Cambridge: Massachusetts Institute of Technology, 2004
Boehm J, Heinkelmann R, Schuh H. A global model of pressure and temperature for geodetic applications. J Geodesy, 2007, 81: 679–683
Boehm J, Niell A, Tregoning P, et al. Global Mapping Function (GMF): a new empirical mapping function based on numerical weather model data. Geophys Res Lett, 2006, 33: L07304
Gan W J, Zhang R, Zhang Y, et al. Development of the Crustal Movement Observation Network of China and its Applications (in Chinese). Rec Dev World Seismol, 2007, 343: 43–52
Choi K, Bilich A, Larson K M, et al. Modified sidereal filtering: implication for high-rate GPS positioning. Geophys Res Lett, 2004, 31, L24610, doi: 10.1029/2004GL021621
Zhu X. The history and prospect of seismic recording system (in Chinese). Prog Geophys, 2002, 17: 301–304
Altamimi, Z, P Sillard, C Boucher. ITRF2000-new release of the international terrestrial reference frame for earth science applications. J Geophys Res, 2002, 107, B10, doi 10.1029/2001JB000561
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Yin, H., Zhang, P., Gan, W. et al. Near-field surface movement during the Wenchuan M s8.0 earthquake measured by high-rate GPS. Chin. Sci. Bull. 55, 2529–2534 (2010). https://doi.org/10.1007/s11434-010-4026-2
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DOI: https://doi.org/10.1007/s11434-010-4026-2