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地球自转及其速率变化是地壳构造运动的重要动力来源,其水平原动力有两种:由两极压向赤道的力,与地球自转角速度平方成正比;东西向的力,与地球自转角加速度成正比,其大小按纬度的分布与全球大地震频度随纬度的分布一致。所造成构造应力的主方向与全球6级以上地震震源机制解得的震源同性质主应力方向及地震带走向的统计结果相符。取其能量的1%,已足够供给地震释放。
Earth’s rotation and its rate change are important sources of motivation for the crustal movement. There are two kinds of horizontal motive force: the force from the poles to the equator is proportional to the square of the Earth’s rotation angular velocity; the east-west force is proportional to the acceleration of the Earth’s rotation angle , Its size distribution by latitude and global earthquakes frequency distribution with the same latitude. The main direction of tectonic stress is consistent with the statistical results of the same principal stress direction and seismic strike direction of the focal source resolved by the focal mechanism above Earthquake No.6 (superscript 6). Take 1% of its energy, enough for the release of earthquakes.