日本Ms9.0地震前的重力高频扰动
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摘要
选取中国重力台网14台gPhone弹簧重力仪组成2个观测剖面,对日本本州东海岸附近海域Ms9.0特大地震前(3月1日至10日)的观测数据进行了分析。结果表明:沿海各台站统一出现了喇叭口状的"重力异常扰动"现象,且扰动异常随震中距的增加呈衰减趋势。
We have chosen fourteen gPhone spring gravimeters of China Gravity Network to form two observation sections,and analyzed the observation records(in March 1 to10) before the M s9.0 earthquake near Japan east coast.The results indicate that a kind of bell-like of abnormal gravity disturbance occurring at all littoral observation stations and the magnitude of abnormal gravity disturbance attenuate with the distance from epicenter.
We have chosen fourteen gPhone spring gravimeters of China Gravity Network to form two observation sections,and analyzed the observation records(in March 1 to10) before the M s9.0 earthquake near Japan east coast.The results indicate that a kind of bell-like of abnormal gravity disturbance occurring at all littoral observation stations and the magnitude of abnormal gravity disturbance attenuate with the distance from epicenter.
引文
1刘子维,等.gPhone重力仪数据采集系统性能的改进[J].大地测量与地球动力学,2010,(增2):102-104.(Liu Ziwei,et al.Improvement in performance of data acqui-sition system of gPhone gravity meters[J].Journal of Geode-sy and Geodynamics,2010,(Supp.2):102-104)
2 Kizawa T.Recording of gravimeter around strong earthquake[J].Oversea Earthquakes,1972,(1):39-41.
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,2008,31(6):1 726-1 734.(HuXiaogang and Hao Xiaoguang.The short-term anomalies de-tected by broadband seismographs before the May 12 Wen-chuan earthquake,Sichuan,China[J].Chinese Journal ofGeophysics,2008,51(6):1 726-1 734)
4郝晓光,胡小刚,许厚泽.汶川大地震前的重力扰动[J].大地测量与地球动力学,2008,(3):129-131.(Hao Xi-aoguang,Hu Xiaogang and Xu Houze.Gravity disturbancebefore wenchuan Ms8.0 earthquake[J].Journal of Geodesyand Geodynamics,2008,(3):129-131)
5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].地球动力学进展,2008,23(4):1 332-1336.(Hao X G and Hu X G.Disturbance before the Wen-chuan earthquake detected by broadband seismometer[J].Progress in Geophysics,2008,23(4):1 332-1 336)
6胡小刚,郝晓光.2009年3月19日Mw7.6汤加大地震的“震前扰动”现象[J].地球物理学进展,2009,24(2):866-870.(Hu Xiaogang and Hao Xiaoguang.Observation offore-seismic disturbance of the 2009/03/19Mw7.6 Tongaearthquake[J].Progress in Geophys,2009,24(2):866-870)
7胡小刚,薛秀秀,郝晓光.IRIS台网地震资料出现2010年1月12日海地大地震“震前扰动现象”[J].地球物理学进展,2010,25(1):134-136.(Hu Xianggang,Xue Xiuxiuand Hao Xiaoguang.Observation of microseism in IRIS re-cords before the 2010-01-02 Haiti earthquake[J].Pro-gress in Geophys,2010,25(1):134-136)
8韦进,等.汶川地震前成都台重力的高频扰动[J].大地测量与地球动力学,2009,(增1):15-19.(WeiJin,et al.Gravity disturbance of high frequcncy at Chengdu seismosta-tion before wenchuanMs8.0 earthquake[J].Journal of Ge-odesy and Geodynamics,2009,(Supp.1):15-19)
9 Riccardi U,et al.Comparison of the Micro-g LaCostegPhone-045 spring gravimeter and the GWR-C026 super-conducting gravimeter in Strasbourg using a 300-day timeseries[J].Metrologia,2011,22(2):1-12.
10郝晓光,胡小刚.汶川大地震“震前扰动”存在“第三类脉动”吗?[J].地球物理学进展,2009,24(4):1 213-1215.(Hao Xiaoguang and Hu Xiaogang.Are“third micro-seisms”in anomalous tremor before the great Wenchuanearthquake?[J].Progress in Geophys,2009,2009,24(4):1 213-1 215)
11 http://weather.unisys.com/hurricane/
2 Kizawa T.Recording of gravimeter around strong earthquake[J].Oversea Earthquakes,1972,(1):39-41.
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,2008,31(6):1 726-1 734.(HuXiaogang and Hao Xiaoguang.The short-term anomalies de-tected by broadband seismographs before the May 12 Wen-chuan earthquake,Sichuan,China[J].Chinese Journal ofGeophysics,2008,51(6):1 726-1 734)
4郝晓光,胡小刚,许厚泽.汶川大地震前的重力扰动[J].大地测量与地球动力学,2008,(3):129-131.(Hao Xi-aoguang,Hu Xiaogang and Xu Houze.Gravity disturbancebefore wenchuan Ms8.0 earthquake[J].Journal of Geodesyand Geodynamics,2008,(3):129-131)
5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].地球动力学进展,2008,23(4):1 332-1336.(Hao X G and Hu X G.Disturbance before the Wen-chuan earthquake detected by broadband seismometer[J].Progress in Geophysics,2008,23(4):1 332-1 336)
6胡小刚,郝晓光.2009年3月19日Mw7.6汤加大地震的“震前扰动”现象[J].地球物理学进展,2009,24(2):866-870.(Hu Xiaogang and Hao Xiaoguang.Observation offore-seismic disturbance of the 2009/03/19Mw7.6 Tongaearthquake[J].Progress in Geophys,2009,24(2):866-870)
7胡小刚,薛秀秀,郝晓光.IRIS台网地震资料出现2010年1月12日海地大地震“震前扰动现象”[J].地球物理学进展,2010,25(1):134-136.(Hu Xianggang,Xue Xiuxiuand Hao Xiaoguang.Observation of microseism in IRIS re-cords before the 2010-01-02 Haiti earthquake[J].Pro-gress in Geophys,2010,25(1):134-136)
8韦进,等.汶川地震前成都台重力的高频扰动[J].大地测量与地球动力学,2009,(增1):15-19.(WeiJin,et al.Gravity disturbance of high frequcncy at Chengdu seismosta-tion before wenchuanMs8.0 earthquake[J].Journal of Ge-odesy and Geodynamics,2009,(Supp.1):15-19)
9 Riccardi U,et al.Comparison of the Micro-g LaCostegPhone-045 spring gravimeter and the GWR-C026 super-conducting gravimeter in Strasbourg using a 300-day timeseries[J].Metrologia,2011,22(2):1-12.
10郝晓光,胡小刚.汶川大地震“震前扰动”存在“第三类脉动”吗?[J].地球物理学进展,2009,24(4):1 213-1215.(Hao Xiaoguang and Hu Xiaogang.Are“third micro-seisms”in anomalous tremor before the great Wenchuanearthquake?[J].Progress in Geophys,2009,2009,24(4):1 213-1 215)
11 http://weather.unisys.com/hurricane/
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