| 河北张北M6.2地震前怀来地震台的中短期异常 |
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| 引用本文： | 宋晓冰,李海孝,张常慧,温超.河北张北M6.2地震前怀来地震台的中短期异常[J].山西地震,2005(1):6-8,17. |
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| 作者姓名： | 宋晓冰 李海孝 张常慧 温超 |
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| 作者单位： | 1. 河北省地震局怀来地震台,河北,怀来,075400
2. 河北省地震局,河北,石家庄,050021 |
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| 摘 要： | 基于强震前主破裂潜在变化过程中产生的地壳形变异常及伴随地壳形变而产生的地下水化学前兆现象随时间变化显示出的动态异常，依据河北怀来地震台形变、地下流体观测资料，研究了1998年河北张北M6．2地震前地形变、地下流体异常特性及同步性，认为其有由短期向临震演化的不同阶段的群体演化特征。形变异常早于流体异常出现，临震异常集中，反映明显。断层气CO2、水汞体应变异常同时在震前2个月出现，显示出异常的集中性、同步性。
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| 关 键 词： | 地震台 中短期异常 地形变 地下流体异常 断层气 临震异常 水汞 河北 集中性 动态 |
| 文章编号： | 1000-6265(2005)01-06-03 |
Medium-term Anomaly at Huailai Seismological Station before Zhangbei Earthquake of M6.2 |
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| SONG Xiao-bing,LI Hai-xiao,ZHANG Chang-hui,WEN Chao.Medium-term Anomaly at Huailai Seismological Station before Zhangbei Earthquake of M6.2[J].Earthquake Research in Shanxi,2005(1):6-8,17. |
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| Authors: | SONG Xiao-bing LI Hai-xiao ZHANG Chang-hui WEN Chao |
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| Institution: | SONG Xiao-bing~1,LI Hai-xiao~1,ZHANG Chang-hui~1,WEN Chao~2 |
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| Abstract: | The changing process of main rupture before a strong earthquake would cause crust deformation anomaly, which would lead to dynamic ground water chemistry anomaly precursor. Based on the data of deformation and ground fluid from Huailai Seismological Station, the features and synchronism of deformation and ground fluid before 1998 Zhangbei earthquake of M6.2 are studied. The result shows that the group evolution features are different in different periods as evolution from short-term to impending period. A deformation anomaly appeared earlier than that of fluid. The anomalies appeared massively and obviously. The anomalies of gas CO_2,steamed from the fault, and volume strain of water mercury appeared simultaneously before 2 months of the earthquake, being of mass and synchronism. |
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| Keywords: | Seismicity anomaly Evolution Synchronism |
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