| 从构造塌陷的角度解释唐山地震的一些趋势异常现象 |
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| 引用本文： | 邱泽华,张宝红.从构造塌陷的角度解释唐山地震的一些趋势异常现象[J].地震地质,1992,14(1):55-60. |
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| 作者姓名： | 邱泽华 张宝红 |
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| 作者单位： | 国家地震局地壳应力研究所，国家地震局地壳应力研究所 北京 100085，北京 100085 |
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| 摘 要： | 构造塌陷,是指构造运动造成的地壳岩层塌陷。根据唐山地震前的跨地震主断裂的水准测量结果,可以认为,伴随1970年5月25日的丰南地震,在主断裂下降盘内出现了大规模的侧向张破裂。这以后出现的地下水位和重力等震前趋势异常,都可以用地下水向破裂区的迁移来解释
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| 关 键 词： | 构造塌陷 唐山地震 地震趋势异常 |
STUDY OF SOME LONG-TERM ANOMALOUS CHANGES PRIOR TO TANGSHAN EARTHQUAKE WITH RESPECT TO TECTONIC CAVE-IN |
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| Qiu Zehua Zhang Baohong.STUDY OF SOME LONG-TERM ANOMALOUS CHANGES PRIOR TO TANGSHAN EARTHQUAKE WITH RESPECT TO TECTONIC CAVE-IN[J].Seismology and Geology,1992,14(1):55-60. |
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| Authors: | Qiu Zehua Zhang Baohong |
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| Abstract: | Tectonic cave-in is straitforward defined as the cave-in of crustal layers associated with tectonic movement.This idea was first published about 20 years ago and explaining the phenomena of Tangshan earthquake with such viewpoint has a history of more than 10 years as well.The levelling measurements across the main fault of Tangshan earthquake suggest that,during 1970 Fengnan earthquake (M=4.7),large scale tensile failure may have occurred in the downthrown block.The long-term anomalous changes in water level and gravity which began later can be explained by assuming that ground water moved into the region of the tensile fractures in this period. |
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| Keywords: | Tectonic cave-in Tangshan earthquake Long-term precursory anomalies |
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