2001年11月14日昆仑山大地震震前扰动信号的再研究

doi:10.6038/cjg2018K0463

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摘要研究了2001年11月14日昆仑山M_S8.1大地震前新疆地区宽频带地震仪记录到的异常扰动事件.新疆地震台网在发生强震的前三天记录到了强烈的扰动信号.由于新疆地震台距离昆仑山大地震的震中很近，因此该震前扰动的成因备受关注，一直被认为可能是与大地震相关的慢地震事件，可能是大地震的某种前兆现象.本研究扩大了观测异常扰动事件的范围，分析了欧亚大陆187个宽频带地震仪在2001年11月的观测记录，发现这些地震仪在11月10—12日期间都记录到了时频特征类似的强扰动信号，其中最强的扰动信号出现在挪威台站KONO.调查研究发现挪威海域在11月10—12日期间出现了一次超强北极风暴，我们对扰动源位置初步定位后发现大地震前欧亚大陆各台站记录的最大扰动信号主要来源于挪威西南海岸.本文的研究结果确认昆仑山大地震前新疆台网记录到的强烈震前扰动信号不是与大地震相关的慢地震事件，而是挪威海域北极风暴激发的微地震（地脉动）.本文进一步研究表明北极风暴激发的地脉动可显著影响中国大陆的地震和重力观测.在分析中国大陆地震台网记录的强扰动信号时，北极风暴的影响不能忽视.

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	程威
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关键词 ：昆仑山大地震, 慢地震, 地震前兆, 微地震, 北极风暴

Abstract：Significant anomalous tremors, observed by the Xinjiang Digital Seismograph Network of China before the 14 November 2001 Kunlun M_S8.1 earthquake, are further investigated in this study. It is noted that Chinese scientists have paid much attention to these tremors, as they appeared three days before the great earthquake and the stations recorded them are very close to the epicenter. So they were considered a result of an unknown slow-earthquake event, a possible precursor of the great earthquake. In this study, we examined the data of 187 seismographers in Asia and Europe, and found out that all of them recorded significant tremors in November 11-12, 2001, three or two days before the main shock. We noted that it is KONO, a station located close to the coast of Norway, recorded the strongest tremor signals. Investigating the historic meteorological reports noticed that a very strong Arctic windstorm occurred in Norwegian Sea in November 11-12, 2001. We located an area for generating the significant tremors, which is a shallow sea region close to the southwest coast of Norway. We thus suggest that the significant tremors before the 2011 Kunlun earthquake were not resulted from a slow earthquake event, instead microseismic waves excited by the Arctic windstorm. Our study indicates that the Arctic windstorm can cause significant tremors, which can affect the observations of gravimeters and seismographers in mainland China. So micro seismic waves caused by the Arctic windstorms cannot be neglected when we investigate anomalous tremors.

Key words： 2001 Kunlun earthquake Slow earthquake Earthquake precursor Microseism Arctic windstorms

收稿日期: 2016-08-22

PACS:

P315

基金资助:国家自然科学基金（41174022，41321063，41021003，41674100，41374029）资助.

通讯作者: 胡小刚,男,研究员.E-mail:hxg432@whigg.ac.cn E-mail: hxg432@whigg.ac.cn

作者简介: 程威,男,1990年生,硕士研究生,主要研究方向为地学信号处理与分析.E-mail:chengwei@whigg.ac.cn

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http://manu39.magtech.com.cn/Geophy/CN/10.6038/cjg2018K0463 或 http://manu39.magtech.com.cn/Geophy/CN/Y2018/V61/I4/1298

Aster R C, McNamara D E, Bromirski P D. 2008. Multidecadal climate-induced variability in microseisms. Seismol. Res. Lett., 79(2):194-202.
Feng X, Tsimplis M, Yelland M. 2012. Extreme waves at Polar front of North Atlantic from 2000 to 2009.//EGU General Assembly 2012. Vienna, Austria.
Gao L J, Yang Y L, Liu J M, et al. 2013. Research on critical slowing down precursor before two moderate earthquakes in Xinjiang. Inland Earthquake (in Chinese), (4):311-318.
Haubrich R A, Munk W H, Snodgrass F E.1963.Comparative spectra of microseisms and swell. Bull. Seismol. Soc. Am.,53, 27-37.
Hu X G, Hao X G. 2008. The short-term anomalies detected by broadband seismographs before the May 12 Wenchuan earthquake, Sichuan, China. Chinese J. Geophys. (in Chinese), 51(6):1726-1734.
Hu X G, Hao X G. 2009. An analysis of the influences of typhoon on anomalous tremors before the great Wenchuan and Kunlunshan earthquakes. Chinese J. Geophys. (in Chinese), 52(5):1363-1375, doi:10.3969/j.issn.0001-5733.2009.05.026.
Hu X G, Hao X G, Xu X X. 2010. The analysis of the non-typhoon-induced microseisms before the 2008 Wenchuan earthquake. Chinese J. Geophys. (in Chinese), 53(12):2875-2886, doi:10.3969/j.issn.0001-5733.2010.12.011.
Longuet-Higgins M S. 1950. A theory of the origin of microseisms. Philosophical Transactions of the royal Society A:Mathematical, Physical and Engineering Sciences, 243(857):1-35.
Mei S R, Xue Y, Song Z P. 2009. Anonymous seismic characteristics before Wenchuan M8.0 and Kunlunsan M8.1 earthquakes and their implications. Earthquake (in Chinese), 29(1):1-14.
Niu A F, Jiang Z S. 2005. Earthquake prediction by using ground deformation observation in China and some problems related to it. Recent Developments in World Seismology (in Chinese), (5):174-178.
Pellikka P, Järvenpää E.2003. Forest stand characteristics and snow and wind induced forest damage in boreal forests. In Ruck, B.:Proc. of the Int.Conf. 269-276.
Reistad M, Breivik Ø, Haakenstad H, et al. 2011. A high-resolution hindcast of wind and waves for the North Sea, the Norwegian Sea, and the Barents Sea. J. Geophys. Res., 116(C5):C05019.
Tanimoto T. 2007. Excitation of microseisms. Geophys. Res. Lett., 34:L05308, doi:10.1029/2006GL029046.
Wang M D, Han Y J, Guo X Y, et al. 2014. Research on anomaly changes of microtremor before strong earthquake. Journal of Seismological Research (in Chinese), 37(1):73-78.
Wang Q L, Zhang X D, Cui D X, et al. 2005. Understanding the mechanisms of premonitory anamolies and imminent precursors. Recent Developments in World Seismology (in Chinese), (5):131-144.
Wang W X, Ma L, Huang J P. 2007. Analysis of anomaly in gravity observation before and after strong earthquakes. Earthquake (in Chinese), 27(2):53-63.
Wang Y Z, Shen Z K. 2007. Research development and perspective on slow slip, tremors, and slow earthquakes. Earthquake Research in China (in Chinese), 23(1):1-9.
Yang Y L, Zhao G M, Gao G Y, et al. 2003. The slow earthquake event occurring before west to Kunlun mountain pass earthquake of M_S8.1 on November 14,2001. Recent Developments in World Seismology (in Chinese), (9):1-4.
Yao H J, Campman X, de Hoop M V, et al. 2009. Estimation of surface wave Green's functions from correlation of direct waves, coda waves, and ambient noise in SE Tibet. Physics of the Earth and Planetary Interiors, 177(1-2):1-11, doi:10.1016/j.pepi.2009.07.002.
Yi L, Yang L M, Pang C. 2014. Research on frequency difference between typhoon disturbance and precursor information of low frequency wave in microtremor recordings. Journal of Seismological Research (in Chinese), 37(1):66-72.
Zhang C J, Shi Y L, Ma L. 2005. Some problems in studying slow earthquakes. Journal of the Graduate School of the Chinese Academy of Sciences (in Chinese), 22(3):258-269.
Zhang Y B, Jiang J, Li S L, et al. 2010. The tropic cyclone aroused the tremor. Chinese J. Geophys (in Chinese), 53(2):335-341, doi:10.3969/j.issn.0001-5733.2010.02.011.
Zhang Y B, Jiang J, Li C Y, et al. 2013. The tremor wave before the Kunlun strong earthquake is not slow earthquake event. Chinese J. Geophys. (in Chinese), 56(3):869-877, doi:10.6038/cjg20130316.
胡小刚, 郝晓光. 2008. 汶川大地震宽带地震仪短临异常及成因初探. 地球物理学报, 51(6):1726-1734.
胡小刚, 郝晓光. 2009. 强台风对汶川大地震和昆仑山大地震"震前扰动"影响的分析. 地球物理学报, 52(5):1363-1375, doi:10.3969/j.issn.0001-5733.2009.05.026.
胡小刚, 郝晓光, 薛秀秀. 2010. 汶川大地震前非台风扰动现象的研究. 地球物理学报, 53(12):2875-2886, doi:10.3969/j.issn.0001-5733.2010.12.011.
高丽娟, 杨又陵, 刘建明等. 2013. 新疆2次中强地震前的临界慢化现象研究. 内陆地震, (4):311-318.
梅世蓉, 薛艳, 宋治平. 2009. 汶川8.0级与昆仑山口西8.1级地震前地震活动异常特征与启示. 地震, 29(1):1-14.
牛安福, 江在森. 2005. 我国地形变观测预报地震的现状及对地震预测问题的思考. 国际地震动态, (5):174-178.
王梅德, 韩艳杰, 郭祥云等. 2014. 地脉动在大震前的异常变化研究. 地震研究, 37(1):73-78.
王庆良, 张晓东, 崔笃信等. 2005. 理解前兆异常变化机理和地震短临前兆. 国际地震动态, (5):131-144.
王武星, 马丽, 黄建平. 2007. 强地震前后重力观测中异常变化现象的研究. 地震, 27(2):53-63.
王阎昭, 沈正康. 2007. 慢滑移及相关脉动和慢地震研究的历史和现状. 中国地震, 23(1):1-9.
杨又陵, 赵根模, 高国英等. 2003. 2001年11月14日昆仑山口西M8.1地震前的缓慢地震事件. 国际地震动态, (9):1-4.
尹亮, 杨立明, 庞成. 2014. 地脉动记录中台风扰动和低频波前兆信息的频带区别研究. 地震研究, 37(1):66-72.
张晁军, 石耀霖, 马丽. 2005. 慢地震研究中的一些问题. 中国科学院研究生院学报, 22(3):258-269.
张雁滨, 蒋骏, 李胜乐等. 2010. 热带气旋引起的震颤波. 地球物理学报, 53(2):335-341, doi:10.3969/j.issn.0001-5733.2010.02.011.
张雁滨, 蒋骏, 李才媛等. 2013. 昆仑山强震前的震颤波并非源自慢地震. 地球物理学报, 56(3):869-877, doi:10.6038/cjg20130316.