| 地震强度因子M_f值在华南和东北地区中强以上地震前的中短期异常变化 |
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| 引用本文： | 王炜,章纯.地震强度因子M_f值在华南和东北地区中强以上地震前的中短期异常变化[J].防灾减灾工程学报,1999(4). |
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| 作者姓名： | 王炜 章纯 |
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| 作者单位： | 上海市地震局!上海200062 |
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| 基金项目： | 中国地震局九五基金!(19950406) |
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| 摘 要： | 用反映地震活动增强特征的地震强度因子Mf 值,系统研究了其在华南和东北地区中强以上地震前的中短期( T≤1 年) 异常变化。结果发现在震前1 年左右,半数震例的震中附近地区出现Mf 值中期异常区明显收缩,即可认为出现Mf 值中短期异常,亦即认为当前已进入地震孕育的中短期阶段。笔者通过对Mf 值在华南和东北地区中强以上地震前在时间和空间上的异常变化研究后认为:该值在上述地区的地震中短期预报中具有一定预报效果
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| 关 键 词： | 地震强度因子M_f值 地震活动性 地震预报 |
SHORT MEDIUM TERM ANOMALOUS VARIATION OF SEISMIC STRENGTH FACTOR M_f VALUE PRIOR TO EARTHQUAKES OVER MODERATE MAGNITUDE IN SOUTH AND NORTHEAST CHINA |
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| WANG Wei,ZHANG Chun.SHORT MEDIUM TERM ANOMALOUS VARIATION OF SEISMIC STRENGTH FACTOR M_f VALUE PRIOR TO EARTHQUAKES OVER MODERATE MAGNITUDE IN SOUTH AND NORTHEAST CHINA[J].Journal of Disaster Prevent and Mitigation Eng,1999(4). |
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| Authors: | WANG Wei ZHANG Chun |
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| Abstract: | The short medium term(T≤1 year) anomalous variations prior to the earthquake over moderate magnitude are systematically studied for south and northeast China using the seismic strength factor M f value reflecting seismicity increase characteristics. It is found that the medium term anomalous area of M f value near epicentre obviously decrease in 50% earthquake cases in some 1 year before earthquake, which is considered as the short medium term anomaly of M f value. |
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| Keywords: | seismicity earthquake prediction seismic strength factor |
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