Result of tomography reveals the structural features of Zhangbei earthquake region.
地震层析成像结果揭示了张北地震区的构造特征。
After Zhangbei earthquake in 1998, the reserve system of rescue materials was established in whole country.
1998年张北地震后，全国建立了救灾物资储备制度。
Before the Datong earthquake, water radon in many Wells showed trend positive anomalies, which is obviously different with the hydrochemical precursors of Zhangbei earthquake.
大同地震前多井出现水氡的趋势性正异常，是与张北地震水化前兆最显著的不同之处。
We believe, as a additional force source, water level of shallow well acts on the crustal rock in form of fluid loading, pore pressure and chemical erosion, which promotes the Zhangbei earthquake.
认为浅井水位作为一种附加力源，以流体载荷、孔隙压力、化学腐蚀的形式作用于地壳岩石，对张北地震的发生起到了促进作用。
In the paper, the character of ground tilt anomalies in Huailai Seismostation before Zhangbei earthquake is discussed, in order to find an effective way of earthquake prediction with ground tilt data.
本文对张北地震前怀来地震台倾斜异常特征进行分析，探讨地震台站利用异常资料预报地震的有效途径。
In this paper, the reason of earthquake damage was analyzed through field investigation of earthquake disaster in the Zhangbei area of Hebei province.
本文在调查河北省张北地区地震震害情况的基础上，分析了震害产生的原因。
In this paper, the reason of earthquake damage was analyzed through field investigation of earthquake disaster in the Zhangbei area of Hebei province.
本文在调查河北省张北地区地震震害情况的基础上，分析了震害产生的原因。
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