| Recurrence anomaly of ground water behavior before strong earthquakes in North China |
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| 作者姓名： | 曹新来 边庆凯 |
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| 作者单位： | Earthquake Administration of Hebei Province，Shijiazhuang 050021，China，Earthquake Administration of Hebei Province，Shijiazhuang 050021，China |
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| 基金项目： | 科技部资助项目，Technology during the Tenth Five-year Plan |
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| 摘 要： | Introduction The behavior of ground water is influenced by many factors, such as rainfall, exploitation ofground water, atmospheric pressure, tidal gravitation, ground stress variation, effect of surfacewater-body loads (or other loads) and other unknown factors. These factors change the dynamicstate of ground water to different extents and result in the diversification of ground water behavior.As for their mechanism, our knowledge is still superficial. Based on various images of water le…
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Recurrence anomaly of ground water behavior before strong earthquakes in North China |
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| CAO Xin-lai BIAN Qing-kai Earthquake Administration of Hebei Province,Shijiazhuang ,China.Recurrence anomaly of ground water behavior before strong earthquakes in North China[J].Acta Seismologica Sinica(English Edition),2004,17(Z1). |
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| Authors: | CAO Xin-lai BIAN Qing-kai Earthquake Administration of Hebei Province Shijiazhuang China |
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| Institution: | Earthquake Administration of Hebei Province, Shijiazhuang 050021, China |
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| Abstract: | By analyzing the relationship between ground water behavior and strong seismic activity during the past more than20 years in North China, we have found similar water level descending variation of a part of wells in theshort-term stage before several strong earthquakes. The characteristics of anomaly are: at the beginning, waterlevel dropped abruptly or accelerated to drop; then it turned to slow rising with a smaller amplitude than that ofdescending; earthquakes occurred during the slow-rising process of water level, and at that time or beforeearthquake occurrence, water level rose with a large amplitude. Among more than 100 wells in North China, thedescending anomalies were not recorded for many times, but similar variation processes of water level were notedat different wells before several strong earthquakes, which proves that seismic precursory anomalies of groundwater are of certain recurrence features, occurring repeatedly before different strong earthquakes. Therefore, it isnecessary to study the genesis of this type of anomaly and its relationship with strong seismic activity. |
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| Keywords: | North China strong earthquake dynamic state of water level short-term stage recurrence |
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