| 地震活动因子A值及其在华北地震中短期预报中的应用 |
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| 引用本文： | 王炜,宋先月,刘峥,王峥峥.地震活动因子A值及其在华北地震中短期预报中的应用[J].西北地震学报,1999,21(3):234-241. |
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| 作者姓名： | 王炜 宋先月 刘峥 王峥峥 |
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| 作者单位： | 1. 上海市地震局,上海,200062
2. 江苏省地震局,江苏,南京,210014 |
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| 基金项目： | 中国地震局9504 项目 |
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| 摘 要： | 综合考虑了地震活动时空强３ 个方面的震兆特征，定义了地震活动因子 Ａ值．使用１９７２ ～１９９６ 年华北地区地震资料进行空间扫描，研究中强以上地震前 Ａ 值的中短期异常变化特征．结果表明，在中短期阶段大多数地震前出现的 Ａ 值中期异常区面积明显缩小或消失，也有一些地震前１ ～３ 个月 Ａ 值异常区面积再次增大．还就用 Ａ 值进行地震中短期预报的有关问题进行了讨论
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| 关 键 词： | 华北 区域地震活动性 地震活动因子A值 中短期异常 |
| 收稿时间： | 1998/8/25 0:00:00 |
| 修稿时间： | :1998-08-2 |
SEISMICITY FACTOR A-VALUE AND ITS APPLICATION IN MID-SHORT TERM EARTHQUAKE PREDICTION IN NORTHERN CHINA |
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| WANG Wei,SONG Xian-yue,LIU Zheng and WANG Zheng-zheng.SEISMICITY FACTOR A-VALUE AND ITS APPLICATION IN MID-SHORT TERM EARTHQUAKE PREDICTION IN NORTHERN CHINA[J].Northwestern Seismological Journal,1999,21(3):234-241. |
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| Authors: | WANG Wei SONG Xian-yue LIU Zheng and WANG Zheng-zheng |
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| Institution: | Seismological Bureau of Shanghai, Shanghai 200062, China,Seismological Bureau of Shanghai, Shanghai 200062, China,Seismological Bureau of Shanghai, Shanghai 200062, China and Seismological Bureau of Jiangsu Province, Nanjing 210041, China |
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| Abstract: | The seismicity factor A-value is defined by synthesizing the seismicity precursors in time, space and magnitude. The seismicity data of moderate or small earthquakes during 1972~1996 in northern China are used in spacial scanning of seismicity factor A-value, studying mid-short term change of the A-value before the earthquakes. The result shows that in mid-short term, the midterm anomaly zones of A-value that appeared about 2~3 years before a lot of strong earthquakes may contract or disappear obviously, and the zones may obviously extend again about 1~3 months before some earthquakes. Some problems about mid-short term earthquake prediction by using the A-value are also disscused. |
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| Keywords: | North China Regional seismicity Seismicity factor A-value Mid-short term anomaly |
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