| 唐山地震前近震中区地电阻率的震前突变现象 |
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| 引用本文： | 金安忠.唐山地震前近震中区地电阻率的震前突变现象[J].地震学报,1982,4(2):169-173. |
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| 作者姓名： | 金安忠 |
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| 作者单位： | 山东省地震局 |
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| 摘 要： | 1976年唐山地震前,在距震中250公里范围內已经建立了16个地电台站。震前10天内有几个台站地电阻率在较平静的趋势背景值上出现大幅度突变异常,尽管这些台站占少数,但却集中分布在发震的沧东断裂附近。 根据唐山地震震源机制解结果,以及发震构造和地下水位变化的实际资料说明,地电阻率突变异常的空间分布与唐山地震断层面是一致的,与震前地下水位变化异常带也是吻合的,地下水震前变化在时间上与地电阻率突变的出现是同步的。
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ON THE SUDDEN CHANGE OF EARTH RESISTIVITY NEAR THE EPICENTRAL AREA JUST PRIOR TO THE 1976 TANGSHAN EARTHQUAKE |
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| Abstract: | Within a distance of about 250 km from the epicenter of the 1976 Tangshan Earthquake, 16 earth resistivity stations had been established. About 10 days before the occurrence of the earthquake, certain stations recorded sudden variations of large amplitudes of earth resistivity values on a rather quiet background, despite such stations are rather few in number.According to the result of focal mechanism solution of the Tangshan earthquake and earthquake fault investigation as well as data from groundwater level changes, it can be seen that the places with sudden earth resistivity variations are located along the earthquake fault and also on a belt of groundwater level changes which in time are at the same pace with the changes of earth resistivity. |
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