全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

利用sPn震相测定芦山MS7.0级地震余震的震源深度

DOI: 10.6038/cjg20140209, PP. 430-440

Keywords: 芦山地震,震源深度,波形互相关,滑动时窗相关法,sPn震相

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用南北地震带南段密集流动地震台阵的观测数据,采用波形互相关方法拾取Pn波走时,应用滑动时窗相关法识别sPn震相,通过sPn与Pn震相之间的走时差测定了芦山地震序列中28个ML4.0级以上余震的震源深度.结果表明,震源深度集中在10~20km范围内,垂直余震带的北西—南东向震源深度剖面揭示,余震分布表现出西深东浅的特点,倾角大约为39°.这些余震在空间上具有较好的线性分布特征,推测可能发生在与主震有关的破裂面上或邻近位置,由此推测主震的破裂面倾角大约为39°.根据余震的空间分布特征,认为芦山地震的发震断层并非双石—大川断裂,可能是其东侧的一条隐伏断层.

References

[1]  Han L B, Jiang C S, Bao F. 2012. Source parameter determination of 2010 Taikang MS4.6 earthquake sequences. Chinese J. Geophys. (in Chinese), 55(9): 2973-2981, doi: 10.6038/j.issn.0001-5733.2012.09.016.
[2]  Hong X, Ye W Y, Shao P R, et al. 2006. sPn seismic phase analysis for a ML5.0 earthquake in southern Taiwan Strait. Seismological and Geomagnetic Observation and Research (in Chinese), 27(1): 26-31.
[3]  Huang Y, Wu J P, Zhang T Z, et al. 2008. Re-determination of the large Wenchuan earthquake (M8.0) and its sequence of its aftershocks. Science in China: Series D (in Chinese), 38(10): 1242-1249.
[4]  Kind R. 1979. Observations of sPn from Swabian Alb earthquakes at the GRF array. Journal of Geophysical Research, (45): 337-340.
[5]  Laurent G, Davidowitz H. 1994. Encoding of olfactory information with oscillating neural assemblies. Science, 265(5180): 1872-1875.
[6]  Laurent G, Wehr M, Davidowitz H. 1996. Temporal representations of odors in an olfactory network. The Journal of Neuroscience, 16(12): 3837-3847.
[7]  Liu C L, Zheng Y, Ge C, et al. 2013. Rupture process of the M7.0 Lushan earthquake, 2013. Science China: Earth Sciences, 56(7): 1187-1192, doi: 10.1007/s11430-013-4639-9.
[8]  Liu J, Yi G X, Zhang Z W, et al. 2013. Sichuan M7.0 earthquake on 20 April 2013. Chinese Journal of Geophysics (in Chinese), 56(4): 1404-1407, doi: 10.6038/cjg20130434.
[9]  Lü P, Ding Z F, Zhu L P. 2011. Application of double-difference relocation technique to aftershocks of 2008 Wenchuan earthquake using waveform cross-correlation. Acta Seismologica Sinica (in Chinese), 33(4): 407-419.
[10]  Luo Y, Ni S D, Zeng X F, et al. 2010. A shallow aftershock sequence in the north-eastern end of the Wenchuan earthquake aftershock zone. Science in China: Earth Science, 53(11): 1655-1664, doi: 10.1007/s11430-010-4026-8.
[11]  Ma S T. 2010. Focal depth determination for moderate and small earthquakes by modeling regional depth phases sPg, sPmP, and sPn. Bulletin of the Seismological Society of America, 100(3): 1073-1088, doi: 10.1785/0120090103.
[12]  Mori J. 1991. Estimates of velocity structure and source depth using multiple P waves from aftershocks of the 1987 Elmore Ranch and Superstition Hills, California, earthquakes. Bulletin of the Seismological Society of America, 81(2): 508-523.
[13]  Ren K X, Zou L H, Liu R F, et al. 2004. Application of sPn to focal depth determination in Inner Mongolia. Seismological and Geomagnetic Observation and Research (in Chinese), 25(3): 24-31.
[14]  Saikia C K, Woods B B, Thio H K. 2001. Calibration of the regional crustal waveguide and the retrieval of source parameters using waveform modeling. Pure and Applied Geophysics,158(7): 1301-1338.
[15]  Saikia C K. 2000. A method for path calibration using regional and teleseismic broadband seismograms: Application to the 21 May 1997 Jabalpur, India earthquake (Mw5.8). Current Science Bangalore, 79(9): 1301-1315.
[16]  Saikia C K. 2006. Modeling of the 21 May 1997 Jabalpur earthquake in central India: Source parameters and regional path calibration. Bulletin of the Seismological Society of America, 96(4A): 1396-1421, doi: 10.1785/0120050120.
[17]  Waldhauser F,Ellsworth W L. 2000. A double-difference earthquake location algorithm: Method and application to the northern Hayward fault, California. Bulletin of the Seismological Society of America, 90(6): 1353-1368.
[18]  Wang C Y, Han W B, Wu J P, et al. 2007. Crustal structure beneath the eastern margin of the Tibetan Plateau and its tectonic implications. Journal of Geophysical Research: Solid Earth, 112(B7), doi: 10.1029/2005JB003873.
[19]  Wang C Y, Lou H, Yao Z X, et al. 2010. Crustal thicknesses and Poisson''s ratios in Longmenshan Mountains and adjacent regions. Quaternary Sciences (in Chinese), 30(4): 652-661,doi:10.3969/j.issn.1001-7410.2010.04.02.
[20]  Wang W M, Hao J L, Yao Z X. 2013.Preliminary result for rupture process of Apr. 20, 2013, Lushan Earthquake, Sichuan, China. Chinese Journal of Geophysics (in Chinese), 56(4): 1412-1417, doi: 10.6038/cjg20130436.
[21]  Wei S J, Ni S D, Chong J J, et al. 2009. The 16 August 2003 Chifeng earthquake: Is it a lower crust earthquake? Chinese Journal of Geophysics (in Chinese), 52(1): 111-119.
[22]  Wu C J, Takeo M. 2004. An intermediate deep earthquake rupturing on a dip-bending fault: Waveform analysis of the 2003 Miyagi-ken Oki earthquake. Geophysical Research Letters, 31(24): L24619.
[23]  Wu J P, Huang Y, Zhang T Z, et al. 2009. Aftershock distribution of the MS8.0Wenchuan earthquake and three dimensional P-wave velocity structure in and around source region. Chinese Journal of Geophysics (in Chinese), 52(2): 320-328.
[24]  Xie Z J, Jin B K, Zheng Y, et al. 2013. Source parameters inversion of the 2013 Lushan earthquake by combining teleseismic waveforms and local seismograms. Science China: Earth Sciences, 56(7): 1177-1186, doi: 10.1007/s11430-013-4640-3.
[25]  Xu X W, Wen X Z, Chen G H, et al. 2008. Discovery of the Longriba fault zone in Eastern Bayan Har Block, China and its geodynamic implications. Sciences in China: Series D, 51(9):1209-1223.
[26]  Xu X W, Wen X Z, Han Z J, et al. 2013. Lushan MS7.0 earthquake: a blind reserve-fault event. Chinese Science Bulletin, 58(28-29):3437-3443, doi: 10.1007/s11434-013-5999-4.
[27]  Yang T, Wu J P, Fang L H, et al. 2012. 3-D S-wave velocity structure of crust and upper mantle beneath North China. Progress in Geophysics (in Chinese), 27(2): 441-454, doi: 10.6038/j.issn.1004-2903.2012.02.007.
[28]  Chen G G, Ji F J, Zhou R J, et al. 2007. Primary research of activity segmentation of Longmenshan fault zone since late-quaternary. Seismology and Geology (in Chinese), 29(3): 657-673.
[29]  Chong J J, Ni S D, Zeng X F. 2010. sPL, an effective seismic phase for determining focal depth at near distance. Chinese J. Geophys. (in Chinese), 53(11): 2620-2630, doi: 10.3969/j.issn.0001-5733.2010.11.010.
[30]  Deng Q D, Zhang P Z, Ran Y K, et al. 2002. Basic features of Chinese active structure. Science in China: Series D (in Chinese), 32(12): 1020-1030.
[31]  Fang L H, Wu J P, Wang W L, et al. 2013. Relocation of the mainshock and aftershock sequences of MS7.0 Sichuan Lushan earthquake. Chinese Science Bulletin (in Chinese), 58(20): 1901-1909, doi: 10.1007/s11434-013-6000-2.
[32]  Gao Y, Wang Q, Zhao B, et al. 2013. A rupture blank zone in middle south part of Longmenshan Faults: Effect after Lushan MS7.0 earthquake of 20 April 2013 in Sichuan, China. Science China: Earth Sciences (in Chinese), 43(6): 1038-1046, doi: 10.1007/s11430-013-4646-x.
[33]  Langston C A. 1987. Depth of faulting during the 1968 Meckering, Australia, earthquake sequence determined from waveform analysis of local seismograms. Journal of Geophysical Research: Solid Earth, 92(B11): 11511-11561.
[34]  Langston C A. 1994. An integrated study of crustal structure and regional wave propagation for southeastern Missouri. Bulletin of the Seismological Society of America, 84(1): 105-118.
[35]  Zeng X F, Luo Y, Han L B, et al. 2013. The Lushan MS7.0 earthquake on 20 April 2013: A high-angle thrust event. Chinese Journal of Geophysics (in Chinese), 56(4): 1418-1424, doi: 10.6038/cjg20130437.
[36]  Zhang G M, Wang S Y, Li L, et al. 2002. Focal depth research of earthquakes in mainland China: implication for tectonics. Chinese Science Bulletin, 47(12): 969-974.
[37]  Zhang R Q, Wu Q J, Li Y H, et al. 2008a. Focal depths for moderate-sized aftershocks of the Wenchuan MS8.0 earthquake and their implication. Science in China: Series D, 51(12): 1694-1702.
[38]  Zhang R Q, Wu Q J. 2008b. Focal depth for an earthquake (MS5.6) on August 31, 2008 in Panzhihua of Sichuan Province. Recent Developments in World Seismology (in Chinese), (12): 1-5.
[39]  Zhang Y, Xu L S, Chen Y T. 2013. Rupture process of the Lushan 4.20 earthquake and preliminary analysis on the disaster-causing mechanism. Chinese Journal of Geophysics (in Chinese), 56(4): 1408-1411, doi: 10.6038/cjg20130435.
[40]  Zheng X F, Ouyang B, Zhang D N, et al. 2009. Technical system construction of data backup centre for China seismograph network and the data support to researches on the Wenchuan earthquake. Chinese Journal of Geophysics (in Chinese), 52(5): 1412-1417, doi: 10.3969/j.issn. 0001-5733.2009.05.031.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133