海南地区3口井水位对苏门答腊两次大地震的同震记录及其特征分析
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摘要
分析了琼海加积井在苏门答腊MS8.7和MS8.5地震时水震波特征及震后出现的水位阶变特征,初步探讨了水位阶变现象的机理。同时还分析了三亚南滨井、文昌潭牛井在苏门答腊MS8.7和MS8.5地震时水震波的高采样率数字化观测资料,结果显示:3口井的水震波优势周期比较一致,同一地震在不同井孔的水震波幅度差别较大,同一井孔不同震级地震的水震波振荡持续时间不同。
The characteristics of seismic water-level fluctuations of the two Sumatra-Andeman strong earthquakes with magnitude 8.7 and 8.5 on December 26,2004 and March 29,2005 recorded at Jiaji station,Qionghai,Hainan were analyzed,the features of the infreguent "terrace" changes of the well water-level after the two earthquakes also were analyzed,the mechanism of "terrace" of the well water-level changes has been primarily discussed.Then the digital observation information with high sample ratio of the Sumatra-Andeman strong earthquakes with magnitude 8.7 and 8.5 at Nanbin station,Sanya and Tanniu station,Wenchang was analyzed.The results suggest that the dominant period of the seismic wave of well water-level at the two wells was comparatively accordant,the amplitudes of seismic water-level fluctuations of the same earthquake at the two wells were clearly different,the time duration of seismic water-level fluctuations of different earthquakes at the same well was also clearly different.
The characteristics of seismic water-level fluctuations of the two Sumatra-Andeman strong earthquakes with magnitude 8.7 and 8.5 on December 26,2004 and March 29,2005 recorded at Jiaji station,Qionghai,Hainan were analyzed,the features of the infreguent "terrace" changes of the well water-level after the two earthquakes also were analyzed,the mechanism of "terrace" of the well water-level changes has been primarily discussed.Then the digital observation information with high sample ratio of the Sumatra-Andeman strong earthquakes with magnitude 8.7 and 8.5 at Nanbin station,Sanya and Tanniu station,Wenchang was analyzed.The results suggest that the dominant period of the seismic wave of well water-level at the two wells was comparatively accordant,the amplitudes of seismic water-level fluctuations of the same earthquake at the two wells were clearly different,the time duration of seismic water-level fluctuations of different earthquakes at the same well was also clearly different.
引文
[1]杨国华,2005年6月学术会议报告。
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车用太,刘五洲,鱼金子,等.2004.井水位对地壳应力-应变响应灵敏度的研究[J].地震,23(3):113—120.CHE Yong-tai,LIU Wu-zhou,YU Jin-zi,et al.2004.The study of responding sensitivity of well water level to crustalstress-strain[J].Seismology and Geology,23(3):113—120(in Chinese).
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舒优良,张世民.2003.周至深井水震波数字化记录与地震波记录的对比研究[J].地震地磁观测与研究,24(5):26—31.SHU You-liang,ZHANG Shi-min.2003.Acomparative study of digital recordings of seismic water—level fluctuations inZhouzhi deep borehole with seismographic recordings[J].Seismological and Geomagnetic Observation Research,24(5):26—31(in Chinese).
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杨竹转.2006.地震引起的地下水位变化及其机理初步研究[D]:[学位论文].北京:中国地震局地质研究所.YANG Zhu-zhuan.2006.Water-level changes induced by earthquakes and a preliminary study of their mechanism[D].Master dissertation.Institute of Geology,China Earthquake Adminstration,Beijing(in Chinese).
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