AI算法用于广西中强地震的回溯性震例研究  

Retrospective Research for M_L≥4. 5 Earthquakes in Guangxi and its Adjacent Beibu Gulf Region by AI Algorithm

作　　者：阎春恒 周斌 陆丽娟 甘延锋 郭培兰 

机构地区：[1]广西壮族自治区地震局,广西南宁530022 [2]广西防震减灾与紧急救援办公室,广西南宁530022

出　　处：《地震研究》2014年第1期16-23,171,共8页Journal of Seismological Research

基　　金：桂科攻项目(12426001);广西壮族自治区地震局科研合同制项目(GXJ2011006)联合资助

摘　　要：运用改进的AI算法对1970年以来广西及其邻近北部湾海域ML≥4.5地震进行回溯性研究.结果表明,AI指数能够量化地给出中强地震前小震活动的“加速”或“减速”的变化程度,在1～3年背景下,这种异常现象较明显,可为该地区开展中短期地震趋势分析提供新的判据.By using the improved Acceleration Index algorithm （AI）,we did a retrospective research for ML ≥ 4.5 earthquakes in Guangxi and its adjacent Beibu gulf region since 1970.The results show that the AI index can show the quantification change degree of strengthening or weakening activity of micro-earthquakes before the moderate-to-strong shocks,and the outstanding feature is more remarkable in 1 year before the moderate-tostrong shock compared to background time of 1 ～ 3 years.It will provide a new identification index for short-intermediate-term seismic tendency analysis.

关 键 词：AI算法 小震活动 回溯性统计 广西地区 

分 类 号：P315.7[天文地球—地震学]