| 大姚6级双震前的地震前兆特征 |
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| 引用本文： | 张燕,吴云,刘永启,施顺英.大姚6级双震前的地震前兆特征[J].大地测量与地球动力学,2004,24(4):72-75. |
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| 作者姓名： | 张燕 吴云 刘永启 施顺英 |
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| 作者单位： | 1. 中国地震局地壳应力研究所武汉创新基地,武汉,430071;中国地震局地震研究所,武汉,430071
2. 武汉大学,武汉,430079 |
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| 基金项目： | 地震科学联合基金 (60 40 2 1) |
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| 摘 要： | 在连续形变观测资料中除了存在于整个时间域的短周期潮汐信息(固体潮)外，还有出现在某个时间段的长周期非潮汐信息．如何从时间或空间上认识和提取这些信息．成为认识地震过程和进行地震预报关键和迫切的问题之一。利用小波分析的时一频特性和奇异性检测特性，对大姚6级双震前的连续形变观测资料进行了处理，提取潮汐资料中的非潮汐信息。发现在地震前震中附近的形变台站都接收到了相同频段的异常信号．周期为几天到十几天，出现在各个台站的时间也大致相同。这些在震前具有一定时、空分布的信息有可能是地震前兆。
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| 关 键 词： | 形变观测 地震前兆 潮汐 台站 前震 形变台 固体潮 空分 定时 信息 |
| 文章编号： | 1671-5942(2004)04-0072-04 |
| 修稿时间： | 2004年4月4日 |
CHARACTERISTICS OF EARTHQUAKE PRECURSOR BEFORE TWO DAYAO EARTHQUAKES |
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| Zhang Yan{,},Wu Yun{,},Liu Yongqi{} and Shi Shunying{,} Wuhan Base of Institute of Crustal Dynamics,CEA,Wuhan Institute of Seismology,CEA,Wuhan Wuhan University,Wuhan.CHARACTERISTICS OF EARTHQUAKE PRECURSOR BEFORE TWO DAYAO EARTHQUAKES[J].Journal of Geodesy and Geodynamics,2004,24(4):72-75. |
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| Authors: | Zhang Yan{ } Wu Yun{ } Liu Yongqi{} and Shi Shunying{ } Wuhan Base of Institute of Crustal Dynamics CEA Wuhan Institute of Seismology CEA Wuhan Wuhan University Wuhan |
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| Institution: | Zhang Yan+{1,2)},Wu Yun+{1,2)},Liu Yongqi+{3)} and Shi Shunying+{1,2)}1) Wuhan Base of Institute of Crustal Dynamics,CEA,Wuhan 4300712) Institute of Seismology,CEA,Wuhan 4300713) Wuhan University,Wuhan 430079 |
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| Abstract: | Continuous deformation data include short-period tidal information which exists in the whole time domain and long-period non-tidal information which exists in some time phases. How to identify and obtain time and space distribution of the information is very important to know about the seismic process and serve for earthquake prediction. In this paper,wavelet analysis is introduced into the continuous deformation data processing. The study shows that before two Dayao earthquakes the deformation stations near epicenter recorded some abnormal signals of the same frequency at the same time and their period is from several days to over ten days. These abnormal signals with certain time-space distribution are earthquake precursor possibly. |
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| Keywords: | non-tidal information wavelet analysis earthquake precursor Dayao earthquake abnormalsignal |
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