摘要
本文运用可公度计算和蝴蝶结构图对斐济地区1962年以来MS≥7.1地震时空对称性及其趋势进行分析,结果显示:2015、2016年斐济地区发生MS≥7.1地震的信号较强,其中2015年的信号强于2016年.通过震中迁移分析,发现其空间迁移经纬向具有一定的同步性和对称性;纬向迁移对称轴在21°S左右,经向迁移对称轴在180°左右.未来空间迁移可能向东北方向迁移,其对称轴呈西北—东南走向.正常年份和厄尔尼诺年份研究区域多发地震,拉尼娜时期地震发生少.该研究对完善重大自然灾害时空对称性理论研究具有参考意义.
Based on the seismic data（MS≥7.1）of Fei Ji area since 1962,the symmetry and tendency of the earthquake disasters in Fei Ji area were analyzed and judged by the methods of commensurability information extraction and map of butterfly structure.The result showed that the earthquake（MS≥7.1）will possibly occur in 2015 and 2016.Besides,a strong symmetry and synchronization of the earthquake（MS≥7.1）can be found easily by epicenter migration analysis.Future earthquakes with MS≥7.1location is east of 180°and north of 21°S.It＇s axis of symmetry in the northwest-southeast direction.Study on normal and EI Nino years regions prone to earthquakes,while is less in La Nina period.The study aimed at enriching case study on the disaster tendency of the symmetry method.
出处
《地球物理学进展》
CSCD
北大核心
2015年第5期2064-2070,共7页
Progress in Geophysics
基金
国家自然科学基金项目"部分重大自然灾害的时空对称性:结构
机理与适应对策"(41171090)
国家社会科学基金重点项目"西部重大灾害时空规律的统计研究"(14AZD094)联合资助
