| 唐山7.8级地震前地下水位异常的模糊识别 |
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| 引用本文： | 郑熙铬,冯德益.唐山7.8级地震前地下水位异常的模糊识别[J].地震地质,1989,11(3):1-8. |
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| 作者姓名： | 郑熙铬 冯德益 |
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| 作者单位： | 天津市地震局
(郑熙铭)，天津市地震局(冯德益) |
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| 摘 要： | 本文利用模糊集从属函数方法,处理了1976年唐山地震前后,京津唐辽地区30余眼井的地下水位资料,约6300多个观测数据。结果表明:在唐山地震之前,地下水位的趋势异常不明显;但在该次地震前存在着明显的短临异常,而且越接近于地震发生,异常井孔越多,越集中于震中地
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| 关 键 词： | 模糊集从属函数 唐山地震 地下水位 |
THE FUZZY RECOGNITION OF PRECURSORY ANOMALIES OF GROUNDWATER LEVEL BEFORE TANGSHAN M=7.8 EARTHQUAKE |
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| Zheng Xi-ming and Feng De-yi.THE FUZZY RECOGNITION OF PRECURSORY ANOMALIES OF GROUNDWATER LEVEL BEFORE TANGSHAN M=7.8 EARTHQUAKE[J].Seismology and Geology,1989,11(3):1-8. |
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| Authors: | Zheng Xi-ming and Feng De-yi |
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| Affiliation: | Seismological Bureau of Tianjin |
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| Abstract: | By using the method of membership function of fuzzy set, which is also called the direct method of fuzzy recognition, we have collected and analysed the data of ground-water level in more than 30 wells located in the Beijing-Tianjin-Tangshan area before and after the 1976 Tangshan earthquake (M = 7.8). The results obtained show that the long and intermediate-term anomalies of groundwater level in wells before Tangshan earthquake are difficult to discover but the short-term and imminent anomalies can be recognized obviously. Moreover, the more the time is closed to occurrence of great earthquakes, the more wells show underground level anomalies. |
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| Keywords: | The fuzzy recognition of precursory anomalies Tangshan earthquake Groundwater level |
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