| 利用重复地震观测粤闽交界地区地壳介质变化 |
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| 引用本文： | 叶秀薇,胡秀敏,刘锦,黄元敏.利用重复地震观测粤闽交界地区地壳介质变化[J].中国地震,2011,27(2):165-172. |
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| 作者姓名： | 叶秀薇 胡秀敏 刘锦 黄元敏 |
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| 作者单位： | 广东省地震局,广州市先烈中路81号,510070 |
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| 基金项目： | 广东省科技计划项目，"十一五"国家科技支撑项目，2010年度震情跟踪合同制定向工作任务 |
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| 摘 要： | 利用粤闽两省数字化地震台网2007年6月～2010年5月的走时及波形记录对南澳地区ML≥1地震用双差法重新进行定位,根据定位结果挑选重复地震丛,并研究地震丛的P波走时经伪弯曲射线追踪技术及波形互相关校正后的走时差变化.经上述处理后,汕头台、潮州台记录的南澳地区地震的P波走时差在2008年6～8月间出现负异常,经与地震活动性及形变观测资料对比分析,认为该时段的负异常反映了区域地壳介质速度有所上升.
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| 关 键 词： | 重复地震 射线追踪 地壳介质变化 粤闽交界 双差定位 |
Monitoring crustal media variation in the border area between Guangdong and Fujian Provinces by using repeating earthquakes |
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| Ye Xiuwei,Hu Xiumin,Liu Jin and Huang Yuanmin.Monitoring crustal media variation in the border area between Guangdong and Fujian Provinces by using repeating earthquakes[J].Earthquake Research in China,2011,27(2):165-172. |
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| Authors: | Ye Xiuwei Hu Xiumin Liu Jin and Huang Yuanmin |
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| Institution: | Ye Xiuwei Hu Xiumin Liu Jin Huang Yuanmin Earthquake Administration of Guangdong Province,Guangzhou 510070,China |
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| Abstract: | In this paper,we relocated earthquakes sequences occurring in the border area between Guangdong and Fujian Provinces from June,2007 to May,2010 using the double-difference location algorithm.During relocating,the cross correlation of waveform data and seismic wave travel time were used.The repeating earthquakes were selected according to the relocated result.We normalized the position of repeating earthquakes by using ray tracing.The accuracy of P-wave travel time can be improved by using ray tracing and cr... |
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| Keywords: | Repeat earthquakes Ray tracing Variation of crustal media The border area between Guangdong and Fujian Provinces Double-difference location algorithm |
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