| 渤海地震是一次地幔地震 |
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| 引用本文： | 刘光夏 赵文俊. 渤海地震是一次地幔地震[J]. 华北地震科学, 1996, 14(1): 36-39 |
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| 作者姓名： | 刘光夏 赵文俊 |
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| 作者单位： | 国家地震局地球物理勘探大队 郑州450003(刘光夏)，海南省地震局 海口570003(赵文俊) |
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| 基金项目： | 地震科学联合基金资助项目 |
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| 摘 要： | １９６９年７月的１８日１３时２４分５０秒，渤海发生了一次７．４级地震，震源深度３５ｋｍ，从地壳厚度分布来看，震中区地壳厚度为２９ｋｍ。所以渤海地震很可能是一次地幔地震。本文从地震活动性、宏观特征分析开始，结合地壳厚度、居里等温面起伏以及地壳上地幔的电性结构和岩石实验材料，对这次地震的深部构造做了论述。
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| 关 键 词： | 渤海 应力积累 上地幔 电性结构 地震 |
THE BOHAI EARTHQUAKE IS A MANTLE EARTHQUAKE |
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| Liu Guangxia. THE BOHAI EARTHQUAKE IS A MANTLE EARTHQUAKE[J]. North China Earthquake Sciences, 1996, 14(1): 36-39 |
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| Authors: | Liu Guangxia |
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| Abstract: | At 13 : 24 : 50 on July 18, 1969, an earthquake with magnitude of 7. 4 (Mb) occurred in the Bohai sea, with its focal depth being 35 km. From the distribution of crustal thickness, it can be seen that the crustal thickness in the epicentral area is 29 km. So the Bohai earthquake is quite possibly a manta! earthquake. The deep structure of this earthquake has been discussed by analysis of seismic activity and macroscopic characteristics, combining with crustal thickness, the undulation of Curie's isotherm surface, the electrical structure of upper mantal of the crust and rock experiment material. |
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| Keywords: | Bohai stress accumalation upper mantal |
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