摘要: |
利用黑龙江及邻近地区地磁场总强度日变化极小值时间资料,分析了2008 ~ 2011年黑龙江及邻区4 次中强地震前地磁“低点时间”在空间上的分布异常特征,发现地磁“低点位移”现象的某些特征类型与该地区中强地震活动存在一定相关性。通过对震前各种分布特征类型的分析,讨论了地磁“低点位移”产生机制,认为地磁“低点位移”对黑龙江及邻区地震活动的短临预测有一定参考价值。 |
关键词: 黑龙江 低点位移 中强地震 |
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基金项目:中国地震局地震科技星火计划项目(XH12015Y)、黑龙江省自然科学基金项目(200906)联合资助 |
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Analysis of the geomagnetic low-value displacement before moderately strong earthquakes in Heilongjiang and its adjacent areas |
Li Jiye1) Ren Jianhui1) Chen Lili4) Hu Binsheng1) Chen Changyong4) Meng Linglei1) Du Tianjiao1) Wu Xiaojun2) Sun Pengyu3)
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1)Harbin Technical Center of Earthquake Prevention and Disaster Reduction,Harbin 150021,China;2) Tonghe Seismic Station,Harbin 150900,China;3)Yanshou Seismic Station,Harbin 150700,China;4) Seismological Bureau of Chuzhou City,Chuzhou 239000,Anhui,China
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Abstract: |
Using the geomagnetic total intensity daily variation in minimum time ( low point time) information, we analyzed the geomagnetic low-point displacement phenomenon before 4 moderately strong earthquakes in Heilongjiang and its adjacent areas during 2008 ~ 2011,and discussed the phenomenon mechanisms. The preliminary results showed that the low-point displacement phenomenon and the occurrence of moderately strong earthquakes in this region have a certain relevance and has some reference value on short-term and impending-earthquake prediction in Heilongjiang Province and its adjacent areas. |
Key words: Heilongjiang Low-value displacement Moderately strong earthquake |