甘东南地区中强地震多学科前兆协调性特征研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
通过对发生在甘东南地区三次中强地震前4个前兆学科以及测震学指标的研究,发现各学科前兆异常在时空上表现出很好的协调性特征.主要表现在:各学科异常持续时间均较短;各异常以中短期为主,有一定中期异常,临震异常不明显;从震前1年到短临阶段异常显示出向震中迁移的迹象;各异常点集中分布在低b值异常区.讨论了前兆协调性与地下流体和深部热物质的运移的关系.
Based on study of some precursors before 3 moderate strong earthquakes in southeast part of Gansu provice,it is found that all kinds of precursors show harmonious character in temporalspatial.The result shows that the anomalies last shorter time and mainly in middleshort term,but in impending term is not clear.From one year to shortimpending stage,the anomalies migrate to earthquake epicenter.The distribution of precursor anomalies and low b value are concentrated to same area.The relationship between the harmonious character of precursors and transportation of underground fluid and thermal material in deep crustal is discussed.
引文
①  尹京苑 ,等 .强震震源孕育过程中短期阶段物理力学机制的理论研究 . 2 0 0 0 .
    [1] 曹玲玲,刘耀炜.西北地下流体观测网综合评价[J].西北地震学报,1999,21(1):62—66.
    [2] 张肇诚主编.中国震例(1986-1988)[M],北京:地震出版社,1999.
    [3] 刘耀炜,范世宏,曹玲玲.地下流体中短期异常与地震活动性指标[J].地震,1999,19(1):19—25.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心