| 怀安4.5级地震和张北6.2级地震前后重力异常变化及对应关系 |
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| 引用本文： | 石荣志.怀安4.5级地震和张北6.2级地震前后重力异常变化及对应关系[J].华北地震科学,1999,17(1):54-60,78. |
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| 作者姓名： | 石荣志 |
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| 作者单位： | 河北省地震局流动测量队 |
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| 摘 要： | 对华北火车流动重力网北环１９８７年－１９９８年２４期复测资料（京西北张家口一带）作了分析，探讨了１９９７年５月２５日怀安４．５级地震和１９９８年１月１０日张北６．２级地震孕育发生过程中重力异常变化及对应关系，研究表明，重力场时空分布变化特征图象较清晰地反映了由孕震过程的非均匀动态到发震的演变过程。
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| 关 键 词： | 华北 重力测量 孕震过程 地震活动性 地震观测 |
THE GRAVITY ANOMALOUS VARIATIONS BEFORE AND AFTER THE HU AAN M4.5 EARTHQUAKE IN 1997AND THE ZHANGBEI M6.2 EARTHQUAKE IN 1998 AND THEIR CORRESPONDING RELATION |
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| Shi Rongzhi.THE GRAVITY ANOMALOUS VARIATIONS BEFORE AND AFTER THE HU AAN M4.5 EARTHQUAKE IN 1997AND THE ZHANGBEI M6.2 EARTHQUAKE IN 1998 AND THEIR CORRESPONDING RELATION[J].North China Earthquake Sciences,1999,17(1):54-60,78. |
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| Authors: | Shi Rongzhi |
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| Abstract: | The analysis has been made for the repetition measurement data(in Zhag ngjiakou area in the west of Beijing)of the No.24 phase from 1987 to 1988 of the north circuit of railway-mobile gravity survey net in North China.The gravity a nomalous variations in the developing process of the Huaian M4.5 earthquake occ urred on May 25,1997 and the Zhangbei M6.2 earthquake on January10,1998 have bee n discussed.The research shows that the variational characteristics of time and space distribution of the gravity field clearly reflected the evolution process from the nonhomogenous state of earthquake preparation to earthquake occurrence. |
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| Keywords: | Hua Bei gravity Survey Seismogenic process Sei smic activity |
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