| 主成分分析法在林甸Ms5．1地震回顾性预测中的应用 |
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| 引用本文： | 李永振.主成分分析法在林甸Ms5．1地震回顾性预测中的应用[J].东北地震研究,2008,24(2):29-34. |
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| 作者姓名： | 李永振 |
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| 作者单位： | 铁岭地震台,辽宁,铁岭,112001 |
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| 摘 要： | 用2005年林甸Ms5．1级地震前后震中附近的地震资料，选择与地震强度有关的3级以上地震频次N、b值、Mf值、C值、和Ac值等6个参量进行主成分分析，实现对上述参量的有效约简。这6个参量之间有一定的相关性，各参量在不同时段的变化各有所异，预报效果并不理想。但是根据主成分分析可以得到反映地震强度的综合指标W，发现该指标在震源区附近出现明显的异常变化，震后异常恢复。表明综合指标W可以较好的反映地震活动的异常特征。
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| 关 键 词： | 主成分分析 相关性 特征向量 贡献率 |
APPLICATION ON THE PRIMARY COMPONENT ANALYSIS METHOD IN LINDIAN Ms5.1 EARTHQUAKE REVIEW PREDICTION |
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| LI Yong-zhen.APPLICATION ON THE PRIMARY COMPONENT ANALYSIS METHOD IN LINDIAN Ms5.1 EARTHQUAKE REVIEW PREDICTION[J].Seismological Research of Northeast China,2008,24(2):29-34. |
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| Authors: | LI Yong-zhen |
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| Institution: | LI Yong-zhen (Tieling Seismic Station, Liaoning Tieling 112001, China) |
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| Abstract: | The primary component analysis were made by the data near the seismic epicenter of Lindian MsS.1 earthqauake and selecting the parameter N （ME ≥3.0）, b, η, Mf, c, Ac, value which had relation to the earthquake strenth, it was achieved to reduce the above-metioned parameters effectively. There were some relativities among 6 parameters and each one was different in distinct stages, but the earthquake intensity synthetic index W can be gained by the primary component analysis. W value showed obvious anomalies before Lindian earthquake and returned to normal after that. It showed that the synthetic index W can reflect the anomolous characteristics of the seismicity. |
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| Keywords: | primary component analysis method relativity eigenvector contribution rate |
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