全球不同地区强震与地球自转之间的关系分析  

Analysis of the relationship between earth rotation and strong earthquakes in different regions of the world

作　　者：陈学忠[1] 陆小华[2] 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]北京农业职业学院,北京100093

出　　处：《国际地震动态》2011年第12期34-40,共7页Recent Developments in World Seismology

摘　　要：对全球及一些地区地震在地球自转速率长周期变化的加速和减速段里年发生次数进行了分析,得到的结果表明,就全球地震而言,减速期7级以上地震年发生次数似乎略高于加速期,8级以上地震年发生次数似乎相当,没有明显差异,8.5级以上地震年发生次数似乎比加速期里高。太平洋东带和太平洋北带的地震,在减速期的年发生次数似乎一致地比加速期略高,而太平洋西带和太平洋南带的地震,在减速期的年发生次数似乎一致地比加速期略低。亚欧带的地震发生在减速期的略比加速期的少,亚欧带东段、大三角地震活动区和亚欧带西段的地震,在减速期的年发生次数似乎一致低于加速期的。对于川滇及缅甸北部地区的地震,在高海拔地区,在减速期间年发生次数为加速期间的3.8倍,而在低海拔地区发生的3次地震都在加速期间。在青藏块体及印度北部地区,加速期间年发生次数约为减速期间的4倍,表明这个地区7.5级以上地震与地球自转加速之间存在着强烈的相关性。台湾及附近地区,7.5级以上地震,在加速期间年发生次数约为减速期间的2.4倍,显示这个地区7.5级以上地震与地球自转加速之间存在着强烈的相关性。上述结果对深入认识地震与地球自转之间的关系具有一定意义。Based on analysis of the annual numbers of earthquakes occurring in the deceleration and acceleration phases of long-period variation in earth rotation for some regions of the world, some results are obtained： In the whole world, the annual number of earthquakes in the deceleration phase is a little higher than that in the acceleration phase for earthquakes of M≥7.0, while there is no obvious difference for earthquakes of M≥8.0 ; For earthquakes of M≥8.5, the annual number of the earthquakes occurring in the deceleration phase is higher than that in the acceleration phase. For the eastern and northern Pacific Ocean seismic belt, it seems that the annual number of earthquakes occurring in the deceleration phase is congruously higher than that in the acceleration phase, but for the western and southern Pacific Ocean seismic belt, the annual number of earthquakes occurring in the deceleration phase is congruously a little lower than that in the acceleration phase. In the Europe-Asia seismic belt, the number of earthquakes occurring in the deceleration phase is a little lower than that in the acceleration phase. In the eastern and western segments of the Europe-Asia seismic belt and the Great Triangle seismic region, the annual number of earth- quakes occurring in the deceleration phase is congruously lower than that in the acceleration phase. In the region including Sichuan and Yunnan provinces of China and northern Myanmar, the annual number of earthquakes occurring in the deceleration phase is 3.8 times as high as that in the acceleration phase for the area of higher sea level, and 3 earthquakes in the area of lower sea level all occurred in the acceleration phase. In the Qinghai-Tibet area and northern India, the annual number of earthquakes of Ms^7.5 occurring in the acceleration phase is 4 times as high as that in the deceleration phase, indicating that the earthquakes of Ms≥7.5 in this region is highly related to the acceleration of rotation of the Earth. In the region around Taiwan, the annual numbe

关 键 词：全球 强震 地球自转 关系 

分 类 号：P315.7[天文地球—地震学]