| 日本秋田地震(1983年7.7级)引起我国应力场的震时调整变化 |
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| 引用本文： | 张昭栋,郑金涵. 日本秋田地震(1983年7.7级)引起我国应力场的震时调整变化[J]. 地震学报, 1990, 12(1): 60-69 |
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| 作者姓名： | 张昭栋 郑金涵 |
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| 作者单位： | 1. 山东省地震局2. 国家地震局地球物理研究所2. 中国科学院上海天文台 |
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| 摘 要： | 本文通过水平分层承压含水层模型,推导出含水层的水头和含水层应力变化之间的定量关系.利用我国在日本秋田地震时有水位阶变的52口井孔的观测资料,通过水井水位的体应变固体潮系数,估算了震时引起我国应力场的调整变化.讨论了这种应力调整时应力增加区和降低区交替出现的可能原因.
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| 关 键 词： | 秋田地震 承压含水层 水位阶变 固体潮系数 应力场 |
ADJUSTMENT VARIATION OF STRESS FIELD IN CHINA WITH THE AKITA EARTHQUAKE IN JAPAN IN 1983 |
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| Affiliation: | 1. Seismological Bureau of Shandong Province;2. Institute of Geophysics, Stiate Selsmological Bureau;3. Shanghai Astronomical Observatory, Academia Sinca |
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| Abstract: | In this paper the quantitative relationship between water head in a model of horizontal multilayer aquifer and stress in aquifer has been deduced. Based on the observational data of co-seismic step variations of water level at 52 wells at the time of the Akita earthquake,Japan,the adjustment variation of co-seismic stress field in China has been calculated by means of the effect of bulk strain tide on water level in wells. The probable origin that areas of stress increment alternate with areas of stress decrement during the stress adjustment in China has also been discussed. |
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