新疆新源、和静交界6.6级地震前后波速比异常特征研究
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摘要
利用天山中段数字化地震观测报告,采用多台和达法,计算了2012年6月30日新疆新源、和静交界6.6级地震前后波速比异常变化情况。结果表明:在该次地震前,波速比在空间上形成一个的低值异常区,其值在1.6左右,地震发生在该异常区的东北缘;地震发生后,震区周围波速比在1.8左右,基本恢复正常。
Using multi-station method,this paper calculated velocity ratio anomaly before and after Xinyuan,Hejing earthquake with MS6.6 according to digital seismic report in middle section of Tianshan.The result shows: a low value region about 1.6 formed before earthquake and earthquake occured in northeast section of this region;the velocity ratio in seismic area returned to normal about 1.8 after earthquake.
Using multi-station method,this paper calculated velocity ratio anomaly before and after Xinyuan,Hejing earthquake with MS6.6 according to digital seismic report in middle section of Tianshan.The result shows: a low value region about 1.6 formed before earthquake and earthquake occured in northeast section of this region;the velocity ratio in seismic area returned to normal about 1.8 after earthquake.
引文
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[12]王林瑛,郭永霞,刘芳,等.文安地震前后首都圈分区波速比时变特征[J].地震学报,2008,30(3):240-253.
[13]王桂岭,吴秀莲,敖雪明.新疆一些中强地震前后的波速比异常[J].西北地震学报,1979,1(2):1-8.
[14]龙海英,聂晓红,唐兰兰.新疆乌苏5.1级地震前波速比异常震例研究[J].地震研究,2011,34(2):126-130.
[15]李帅,许冲,陈建波,等.新疆新源、和静交界MS6.6地震地质灾害诱发因素浅析[J].内陆地震,2012,26(4):365-372.
[2]Nur A.Dilatancy pore fluids and premonitory variations of tS/tP travel times[J].Bull Seism Soc Amer,1972,62(5):1 217-1 222.
[3]冯德益,谭爱娜,王克芬.近震地震波波速异常与地震预报[J].地球物理学报,1974,17(2):84-97.
[4]冯锐,庞庆衍,傅征祥.海城地震前后地震波速比地变化[J].地球物理学报,1976,19(4):295-305.
[5]Walck M C.Tree-dimensional vP/vS variations for the Coso region of California[J].J Geophys Res,1988,93:2 047-2 053.
[6]Hauksson E and Haase J.Three-dimensional vP/vS Wave-velocity model of the Los Angels basin and central Transverse Ranges,California[J].J Geophys Res.,1994,102:5 423-5 453.
[7]Li Y G,Vidale J E,Aki K,et al.Evidence of shallow fault zone healing after the 1992 M7.5 Landers,California,earthquake[J].Science,1998,279:217-219.
[8]张学民,刁桂苓,束沛镒.华北地区地下介质波速比值vP/vS研究[J].地震地质,2004,26(2):305-317.
[9]赵明淳,刁桂苓,张学民.首都圈平均波速比分析[J].西北地震学报,2005,27(3):245-254.
[10]刁桂苓,周仕勇,刘杰,等.岫岩地震序列的平均波速比前兆异常[J].华北地震科学,2005,23(4):1-5.
[11]黎明晓,刘杰.云南地区地震序列的波速比vP/vS异常研究[J].地震,2006,26(1):26-34.
[12]王林瑛,郭永霞,刘芳,等.文安地震前后首都圈分区波速比时变特征[J].地震学报,2008,30(3):240-253.
[13]王桂岭,吴秀莲,敖雪明.新疆一些中强地震前后的波速比异常[J].西北地震学报,1979,1(2):1-8.
[14]龙海英,聂晓红,唐兰兰.新疆乌苏5.1级地震前波速比异常震例研究[J].地震研究,2011,34(2):126-130.
[15]李帅,许冲,陈建波,等.新疆新源、和静交界MS6.6地震地质灾害诱发因素浅析[J].内陆地震,2012,26(4):365-372.
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