2009年3月19日M_w7.6级汤加大地震的“震前扰动”现象
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摘要
汶川大地震爆发后,作者在武汉大地测量国家野外科学观测站的重力仪资料中发现了震前约48小时的"重力扰动"现象、并在随后对全国数十个台站宽带地震仪资料的分析中得到了证实, 2009年3月19日,太平洋岛国汤加海域爆发了M_w7.6级(里氏7.9级)大地震,宽带地震仪资料中再次出现了显著的、信号周期为4-8秒的"震前扰动"现象:从大地震前约16天的3月4日开始一直持续到地震发生。
It has beenreported that we discovered significant gravity disturbance before the 2008 Wenchuan earthquake (M_s=8.0) at the Wuhan national field scientific observational station for geodesy , and we confirmed our observation by broadband seismometers data from several tens station across the country. On 19 Mar, 2009 the M_w 7. 6 earthquake struck the South Pacific island country of Tonga. We found that the significant fore-seismic disturbance was also be observed by broadband seismometers. The disturbance signals started on 16 Mar, 16 days before the Tonga earthquake, with its period mainly in band of 4-8 s.
It has beenreported that we discovered significant gravity disturbance before the 2008 Wenchuan earthquake (M_s=8.0) at the Wuhan national field scientific observational station for geodesy , and we confirmed our observation by broadband seismometers data from several tens station across the country. On 19 Mar, 2009 the M_w 7. 6 earthquake struck the South Pacific island country of Tonga. We found that the significant fore-seismic disturbance was also be observed by broadband seismometers. The disturbance signals started on 16 Mar, 16 days before the Tonga earthquake, with its period mainly in band of 4-8 s.
引文
[1] 郝晓光,胡小刚,许厚泽,等.汶川大地震前的重力扰动[J].大地测量与地球动力学,2008,28(3) :129-131． Hao X G, Hu XG, Xu H Z, et al. Gravity disturbance before the Wenchuan M_s8． 0 earthquake[J]. Journal of Geodesy and Geodynamics (in Chinese), 2008, 28(3) : 129-131．
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[3] 胡小刚,郝晓光.汶川大地震宽带地震仪短临异常及成因初探[J].地球物理学报,2008,51(6) :1726-1734． Hu X G, HaoX G. The short-term anomalies detected by broadband seismographs before the May 12 Wenchuan earthquake, Sichuan, China [J]. Chinese J. Geophys. (in Chinese), 2008, 51(6) : 1726-1734．
[4] 张雁滨,蒋骏,廖盈春,等.宽频带地震计及倾斜、重力仪对长周期波动信号的综合观测[J].地震学报,2008,30(6) :626-633． Zhang Y B, Jiang J, Liao Y C, et al. Joint observation of long period seismic signals with broad band seismometer, tiltmeter and gravimeter[J]. Acta Seismologica Sinica, (in Chinese), 2008, 30(6) : 626-633．
[5] 傅容珊,万柯松,崇加军,等.地震前兆还是其它因素?--与“汶川大地震宽带地震仪短临异常及成因初探”作者商榷[J].地球物理学报,2009,52(2) :584-589． Fu R S, Wan K S, Chong J J, et al. Earthquake auspice or other factor ?-Discuss with authors of the paper "The short-term anomalies detected by broadband seismographs before the May 12 Wenchuan earthquake, Sichuan, China"[J]. Chinese J. Geophys. (in Chinese), 2009, 52(2) : 584-589．
[6] 杨又陵,赵根模,高国英,等.2001年11月14日昆仑山口西M8． 1地震前的缓慢地震事件[J].国际地震动态,2003(9) :1-4． Yang Y L, Zhao G M, Gao G Y, et al. The Slow Earthquake Event Occurring Before West to Kunlun Mountain Pass Earthquake of M_s 8． 1 on November 14, 2001 [J]. Recent Developments in World Seismology (in Chinese) , 2003, 9, 1-4．
[7] 胡小刚,郝晓光.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[J].地球物理学报,2009,52(5) :1363-1375． Hu X G, HaoX G. An analysis of the influences of typhoon on anomalous tremors before the great Wenchuan and Kunlunshan earthquakes [J]. Chinese J. Geophys. C in Chinese), 2009,52(5) : 1363-1375．
[8] Longuet-Higgins M S. A theory of origin of microseisms[J]. Philos. Trans. R. Soc. London, Ser. A, 1950, 243:1-35．
[9] Hasselmann K A, A stratistical analysis of the generation of microseisms[J]. Rev. Geophys., 1963,1: 177-209．
[10] Tanimoto T. Excitation of normal modes by nonlinear interaction of ocean waves[J]. Geophys. J. Int. , 2007, 168: 571-582．
[11] Tanimoto T. Excitation of microseisms[J]. Geophys. Res. Lett. , 2007, 34:5308．
[2] 郝晓光,胡小刚.宽带地震仪资料证实汶川大地震“震前重力扰动”[J].地球物理学进展,2008,23(4) :1332-1335． Hao X G, Hu X G. Disturbance before the Wenchuan earthquake by broadband seismometer [J]. Progress in Geophysice (in Chinese), 2008, 23(4) : 1332-1335．
[3] 胡小刚,郝晓光.汶川大地震宽带地震仪短临异常及成因初探[J].地球物理学报,2008,51(6) :1726-1734． Hu X G, HaoX G. The short-term anomalies detected by broadband seismographs before the May 12 Wenchuan earthquake, Sichuan, China [J]. Chinese J. Geophys. (in Chinese), 2008, 51(6) : 1726-1734．
[4] 张雁滨,蒋骏,廖盈春,等.宽频带地震计及倾斜、重力仪对长周期波动信号的综合观测[J].地震学报,2008,30(6) :626-633． Zhang Y B, Jiang J, Liao Y C, et al. Joint observation of long period seismic signals with broad band seismometer, tiltmeter and gravimeter[J]. Acta Seismologica Sinica, (in Chinese), 2008, 30(6) : 626-633．
[5] 傅容珊,万柯松,崇加军,等.地震前兆还是其它因素?--与“汶川大地震宽带地震仪短临异常及成因初探”作者商榷[J].地球物理学报,2009,52(2) :584-589． Fu R S, Wan K S, Chong J J, et al. Earthquake auspice or other factor ?-Discuss with authors of the paper "The short-term anomalies detected by broadband seismographs before the May 12 Wenchuan earthquake, Sichuan, China"[J]. Chinese J. Geophys. (in Chinese), 2009, 52(2) : 584-589．
[6] 杨又陵,赵根模,高国英,等.2001年11月14日昆仑山口西M8． 1地震前的缓慢地震事件[J].国际地震动态,2003(9) :1-4． Yang Y L, Zhao G M, Gao G Y, et al. The Slow Earthquake Event Occurring Before West to Kunlun Mountain Pass Earthquake of M_s 8． 1 on November 14, 2001 [J]. Recent Developments in World Seismology (in Chinese) , 2003, 9, 1-4．
[7] 胡小刚,郝晓光.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[J].地球物理学报,2009,52(5) :1363-1375． Hu X G, HaoX G. An analysis of the influences of typhoon on anomalous tremors before the great Wenchuan and Kunlunshan earthquakes [J]. Chinese J. Geophys. C in Chinese), 2009,52(5) : 1363-1375．
[8] Longuet-Higgins M S. A theory of origin of microseisms[J]. Philos. Trans. R. Soc. London, Ser. A, 1950, 243:1-35．
[9] Hasselmann K A, A stratistical analysis of the generation of microseisms[J]. Rev. Geophys., 1963,1: 177-209．
[10] Tanimoto T. Excitation of normal modes by nonlinear interaction of ocean waves[J]. Geophys. J. Int. , 2007, 168: 571-582．
[11] Tanimoto T. Excitation of microseisms[J]. Geophys. Res. Lett. , 2007, 34:5308．
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