摘要
应用灰色理论GM( 1,1)预测模型估计我国未来时段的地震趋势。为提高预测精度和反映“最新信息” ,在组成原始数列时 ,对于M≥ 7 5级地震 ,由平静幕、活跃幕采用不同震级阈值联合组成 ;对于其它级别地震则尽可能采用当前活动期以来的数据。计算结果表明 ,1997～ 2 0 0 0年期间我国大陆及邻区有发生M≥ 7 5级地震的可能 ,大陆西部可能发生 7 0至 7 5级以上地震 ;东部可能发生 5 5至 6 0级以上地震。同时 。
In this paper,the seismic tendency in coming years in China is estimated by using GM(1,1) the prediction model of grey system theory.In order to improve its precision and reflect“ the latest information”,we constructed the primitive sequence using different magnitude threshold value in quiet and active episodes for the earthquakes whose magnitude M ≥7 5 and adopted the data from the present active episode for other magnitude scale earthquakes.The results show that there are possibility of earthquakes occurance with M ≥7 5 in China continent and its vicinity region from 1997 to 2000,and possibility of occurance earthquakes with M ≥7 0 or even M ≥7 5 in the west of continent and M ≥5 5 or M ≥6 0 earthquake in the east of continent.The present active episodes maybe longer than the our expect time.
出处
《华南地震》
1998年第4期31-34,共4页
South China Journal of Seismology
