Abstract:

The active belt strikes, mobile fashions, source principal compressive stress directions, total shift directions, distribution along latitudes and change along with the time of large earthquakes in East Asia continent all correlate to the speed change of earth's rotation The initial two years in the increasing speed of earth's rotation are the active periods of EW and SN striking earthquake belts, principal compressive stress directions in this region are in NW quadrant and earthquakes shift totally from NW to SE in these periods, after these are active periods of NE and NW striking earthquake belts, principal compressive stress directions in this region are about in 90°angles near EW and earthquakes shift totally from W to E; the times on uniform speed of earth's rotation are active periods of NE and NW striking earthquake belts, principal compressive stress directions in this region are in 90°angles near SN and earthquakes shift totally from N to S; the initial two years in the decreasing speed of earth's rotation are the active periods of NNE and WNW striking earthquake belts, principal compressive stress directions in this region are in NE quadrant and earthquakes shift totally from NE to SW in these periods, the times after these are active periods of NE and NW striking earthquake belts, principal compressive stress directions in this region are about in 90°angles near EW and earthquakes shift totally from E to W. The most places of M≥7 earthquake frequency along latitudes are at N42°. The earthquakes decrease during increasing speed of earth's rotation and the earthquakes increase during decreasing speed of earth's rotation. The earthquakes happening during lower speed of earth's rotation are more than during higher speed of earth's rotation.

Key words: East Asia Continent, Earthquakes, Earth’s rotation, Source dynamic

摘要：

东亚大陆大地震的活动带走向、活动方式、震源主压应力方向、总迁移方向,沿纬度的分布和发震频度随时间的变化,均与地球自转速率变化有成因联系。本文从地球自转加速、减速、匀速的变化趋势进行这方面的观测资料分析,证明地球速率变化是东亚大陆地震的基本动力来源。

关键词: 东亚大陆, 地震, 地球自转, 动力