| 宁夏及邻近地区地震活动能量场的统计分析 |
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| 引用本文： | 杨明芝,赵卫明.宁夏及邻近地区地震活动能量场的统计分析[J].地震学报,2004,26(5):516-522. |
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| 作者姓名： | 杨明芝 赵卫明 |
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| 作者单位： | （中国银川750001宁夏回族自治区地震局） |
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| 摘 要： | 应用随机函数理论,将区域地震活动能量看作是空间和时间的随机函数,采用自然正交函数展开的分析方法,对宁夏及邻近地区小地震活动场的特征进行了研究．重点分析了场的主要部分,即前几个典型场的时间权重系数的时间变化,发现它们在中强地震发生前数值有较大幅度的升、降变化,显示出了与区域及其周围中强地震相关的变化特性．从宁夏地区的震例看,地震能量随机场的自然正交函数展开方法是一种值得探索的地震分析预测方法．
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| 关 键 词： | 地震能量场& 自然正交展开& 预测方法 |
| 文章编号： | 0253-3782(2004)05-0516-07 |
| 修稿时间： | 2003年5月26日 |
STATISTICAL ANALYSIS ON ENERGY FIELD OF SEISMICITY IN NINGXIA AND ITS NEIGHBORHOOD REGION |
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| Yang Mingzhi,Zhao Weiming.STATISTICAL ANALYSIS ON ENERGY FIELD OF SEISMICITY IN NINGXIA AND ITS NEIGHBORHOOD REGION[J].Acta Seismologica Sinica,2004,26(5):516-522. |
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| Authors: | Yang Mingzhi Zhao Weiming |
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| Abstract: | The random function theory is used in the paper. Taking the regional seismicity energy as the random function of space and time, the features of small seismicity field in Ningxia and its neighborhood region are studied by the analytical method of natural orthogonal function expansion. The chief part of the field, i.e., the temporal changes of time "weight" coefficients of first several typical fields is analyzed. We have found that their values had upward and downward changes of a large amplitude before moderate-strong earthquakes and showed variation features correlating to moderate-strong earthquakes occurred in the region and its surrounding areas. From the earthquake examples in Ningxia region, we can make the conclusion that the method of natural orthogonal function expansion of earthquake energy stochastic field is an earthquake analysis and prediction method that is worth further exploration. |
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| Keywords: | earthquake energy field natural orthogonal function expansion prediction method |
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