2009—2010年日食活动对湖北地区地震前兆观测的影响
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摘要
对2009—2010年两次日食活动期间的湖北省区域地震前兆原始观测数据进行分析,结果显示日食效应对某些前兆测项有一定影响,具体表现为:1)地磁观测到达低值时间出现于日全食开始前;2)2009年7月22日日全食和2010年1月15日日环食期间地磁观测测项分量、扰动形态变化特征不尽相同。日全食前后地磁场变化主要表现为地磁水平分量H向下跃动的起伏型变化,具有短时、较为同步的特点;而日环食发生时,地磁场的变化主要表现为地磁偏角D的趋势转折,具有趋势变化、滞后性的特点;3)日食活动对地壳形变中的固体潮线应变和倾斜量也产生短时扰动。
The continuous and precise data were recorded by variety precursor instruments in the Hubei Local-Earthquake-precursor Observing System during the 2009-2010 solar eclipse.After the careful processing and analysis for observations,three significant variations all related to the solar eclipse are found.Firstly,the geomagnetic anomaly valleys appeared before the eclipse starting.Secondly,during the total and annular solar eclipse,there were some differences between geomagnetic components and between micro-changing geomagnetic anomaly phenomena.Before and after the total solar eclipse,there were clear features with short-time and synchronization on the geomagnetic horizontal component.However,during the annular solar eclipse,geomagnetic declination component shows transition-type change characteristics with trended and lagged.Thirdly,the solar eclipse made the tilt and strain of crustal deformation observations short-time pulsate.
The continuous and precise data were recorded by variety precursor instruments in the Hubei Local-Earthquake-precursor Observing System during the 2009-2010 solar eclipse.After the careful processing and analysis for observations,three significant variations all related to the solar eclipse are found.Firstly,the geomagnetic anomaly valleys appeared before the eclipse starting.Secondly,during the total and annular solar eclipse,there were some differences between geomagnetic components and between micro-changing geomagnetic anomaly phenomena.Before and after the total solar eclipse,there were clear features with short-time and synchronization on the geomagnetic horizontal component.However,during the annular solar eclipse,geomagnetic declination component shows transition-type change characteristics with trended and lagged.Thirdly,the solar eclipse made the tilt and strain of crustal deformation observations short-time pulsate.
引文
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8周志坚,杜爱民.用小波方法分析2000年7月13日地磁扰动[J].地球物理学进展,2004,19(4):80-983.(ZhouZhijian and Du Aimin.Wavelet analysis of geomagnetic dis-turbance on July 13,2000[J].Progress in Geolhysics,2004,19(4):80-983)
9肖赛冠,张东和,肖佐.台风激发的声重力波的可探测性研究[J].空间科学学报2007,27(1):35-40.(XiaoSaiguan,Zhang Donghe and Xiao Zuo.Study on the detect-ability of Typhoon-generated acoustic-gravity waves[J].Chin.J.Space Sci,2007,27(1):35-40)
10李启泰,谢金来,杨训仁.日环食激发大气声重力波的研究[J].声学学报,1992,5,17(3):171-186.(Li Qi-tai,Xie Jinlai and Yang Xunren.A study on atmosphericacoustic-gravity waves excited by annular solar eclipse[J].Acta Acustica,1992,5,17(3):171-186)
2 Xinshe Yang and Qianshen Wang.Gravity anomaly duringthe Mohe total solar eclipse and new constraint on gravita-tional shielding parameter[J].Astrophysics and Space Sci-ence 2002,282:245-253.
3 D’costa A and Beles X.Morphological variation of geomag-netic pulsation during solar eclipse in Oct.12,1977[J].Ge-omagnetism and Auronamy,24,c,658-661,1984(in Rus-sian).
4吕品姬,等.2009年日全食期间黄梅台的固体潮扰动[J].大地测量与地球动力学,2010,(8):116-119.(L櫣Pinji,et al.Tidal disturbance observed at Huangmei stationduring solar eclipse 2009[J].Journal of Geodesy and Geo-dynamics,2010,(8):116-119)
5张燕,吴云,吕品姬.汶川8.0级地震前定点形变异常特征[J].地震学报,2009,31(2):152-159.(Zhang Yan,Wu Yun and L櫣Pinji.Characteristics of deformation anoma-ly obtained from tilt and strain observations before the Wen-chuanMs8.0 earthquake[J].Acta Seismologica Sinica,2009,31(2):152-159)
6张燕,等.潮汐形变资料中地震前兆信息的识别与提取[J].大地测量与地球动力学,2003,(4):103-108.(Zhang Yan,et al.Identification and extraction of earth-quake precursor from tidal deformation data[J].Journal ofGeodesy and Geodynamics,2003,(4):103-108)
7宋治平,等.小波分析方法在形变数字化资料处理中的应用[J].大地测量与地球动力学,2003,(4):21-27.(Song Zhiping,et al.Application of wavelet transform to a-nalysis of digital deformation data[J].Journal of Geodesyand Geodynamics,2003,(4):21-27)
8周志坚,杜爱民.用小波方法分析2000年7月13日地磁扰动[J].地球物理学进展,2004,19(4):80-983.(ZhouZhijian and Du Aimin.Wavelet analysis of geomagnetic dis-turbance on July 13,2000[J].Progress in Geolhysics,2004,19(4):80-983)
9肖赛冠,张东和,肖佐.台风激发的声重力波的可探测性研究[J].空间科学学报2007,27(1):35-40.(XiaoSaiguan,Zhang Donghe and Xiao Zuo.Study on the detect-ability of Typhoon-generated acoustic-gravity waves[J].Chin.J.Space Sci,2007,27(1):35-40)
10李启泰,谢金来,杨训仁.日环食激发大气声重力波的研究[J].声学学报,1992,5,17(3):171-186.(Li Qi-tai,Xie Jinlai and Yang Xunren.A study on atmosphericacoustic-gravity waves excited by annular solar eclipse[J].Acta Acustica,1992,5,17(3):171-186)
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