| 利用历史有感地震目录（M≥3（1／2））研究华北地区地震活动性特征 |
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| 作者单位： | 河北省地震局 |
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| 摘 要： | 对新编的华北地区历史有感地震目录（３（１／２）≤Ｍ＜４（１／２））的精度和可信度进行了讨论。认为该地震目录从１４８４年后的记载率较高，它的发震时间、震中位置和震级的精度基本可以满足研究历史地震活动性的需要。它与中国地震目录（Ｍ≥４（３／４））比较，补充了相当数量的３（１／２）≤Ｍ≤４（１／２）的地震。利用历史有感地震目录分析了华北北部部分６级以上的历史地震，结果表明，这些地震在强震发生前具有明显的空区、条带、地震活动性增强、平静等前兆特征，同时，也显示了某些强＊发生前的前震活动和主震之后起伏的强余震活动
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| 关 键 词： | 历史有感地震 华北 地震活动性 |
RESEARCH ON THE SEISMIOCITY CHARACTERISTI IN NORTH CHINA BASED ON CATALOGUE OF HISTORIC FELT EARTHQUAKES（M≥3 1／2） |
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| Abstract: | An examination of the catalogue of historic felt earthquakes（3 1／2≤M≤4 1／2）in NorthChina suggests that the felt seismic events have been recorded with higher quality since 1484 andin the catalogue the precision in recorded time, epicenter and magnitude of the felt events record-ed meets basically the need of research of the historic seismicity. Comparing with China Earth-quake Catologue (M≥4 3／4 ), many earthquakes of 3 1／2 ≤M≤4 1／2 can be added form the cata-logue The historic earthquakes （M＞6）in the northern part of North China recorded in this cata-logue are analyses The result shows that the seismic gap, zone,quiesence and high activity be-fore strong shocks can obviously found,and the foreshocks before strong earthquakes and strongaftershocks also displayed |
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| Keywords: | Historic felt earthquake North China seismicity |
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