| 张北6.2级地震发生在小震条带上 |
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| 引用本文： | 刁桂苓,张四昌.张北6.2级地震发生在小震条带上[J].华北地震科学,1998,16(3):34-38. |
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| 作者姓名： | 刁桂苓 张四昌 |
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| 作者单位： | 河北省地震局!石家庄，050021 |
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| 基金项目： | 中国地震局项目!95—04 |
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| 摘 要： | 分析晋、冀、蒙交界地区的地震分布格局，发现张北地震前存在小地震条带。条带由２０余年持续发生的小震组成，与华北地壳应力场最大剪切应力方向相同，是燕山－渤海地震构造带的西延段落。６．２级强震发生在条的东端。文中讨论了张北地震地点预测失误的原因，提出采用地震学和地震地质学交叉，融合的思路，分析观今小地震活动图象、震源机制资料，从构造学，运动学，动力学角度，研究地壳深部地震构造的方法。
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| 关 键 词： | 地震条带 深断裂 中期预报 地震预报 |
THE ZHANGBEI EARTHQUAKE OCCURRED ON A WEAK EARTHQUAKE BELT |
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| Diao Guiling,Zhangsichang,Zhu Ailan.THE ZHANGBEI EARTHQUAKE OCCURRED ON A WEAK EARTHQUAKE BELT[J].North China Earthquake Sciences,1998,16(3):34-38. |
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| Authors: | Diao Guiling Zhangsichang Zhu Ailan |
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| Abstract: | By analyzing the pattern of the earthquake epicenters in the adjacent region between Shanxi, Hebei, and Inner Mongolia. it has been discovered that a weak earthquake belt existed before the Zhangbei earthquake occurred. This belt,made of small earthquakes occurred in more than 20years, striking to the maximum shear stress of North China crust stress field, is an extension toward the west of Yanshan-Bobai seismotectonic zone,at east end of which occurred the Zhangbei earthquake of M 6. 2. Reasons of the mistakes in the location prediction of the Zhangbei earthquake are discussed. A new method based on the tectonics,kinetics and dynamics to study deep seismotectonics has been proposed,in which seismology and geology is combined, and the pattern of recent small earthquakes and focal mechanism is analyzed. |
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| Keywords: | Zhangbei earthquake seismic belt deep crust fault zone medium term prediction |
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