【摘要】 本文通过对 2 0 0 4年 1 2月 2 6日印度洋 8 7级大震前 7级地震的分析 ,指出8 7级大地震前存在两支 7级地震条带。文中对两支 7级地震条带进行时空分析 ,得出汤加群岛 印度尼西亚 7级地震带由东向西逐渐迁移的特点。在本文的讨论中 ,针对中蒙交界 苏门答腊M≥ 7 7级地震南北对迁的特点 ,对未来地震趋势进行了分析。更多还原

【Abstract】 This paper discussed the temporal and spatial distribution characteristics of M≥7 quakes before Dec. 26, 2004 Indonesia magnitude 8.7 quake. The results indicate that there are two seismic belts of magnitude 7 quakes before the magnitude 8.7 quake, one belt is from Tonga islands to Indonesia, another is from the boundary between China and Mongolia to Sumatra. The seismic activity has gradually migration from east to west in the belt of Tonga islands to Indonesia, and from south to north in the belt of China and Mongolia to Sumatra. Finally, this paper discussed the earthquake tendency after Indonesia magnitude 8.7 quake.更多还原