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本文取1900年─1980年全球Ms≥6．0地震7936次分析后发现，地震发生在南北回归线（23°5N—23°5S）之间占49．69％，发生在南北极因（63°5N—63°5S）之间占99．17％，发生在南北极圈外只占0．83％，即很少发生地震；其中8级地震98次，在35°N线为高峰。又分析了公元648年─1979年全球M≥8级地震257次主要亦集中在35°N线附近。尤其是历史上破坏性极大的地震在35°N线附近者多。这些现象可能和地球自转有一定关系。
In this paper, we take 7936 times of the global Ms≥6.0 earthquakes from 1900 to 1980 and find that the earthquakes account for 49.69% between the north and south tropic (23 ° 5N-23 ° 5S) 5N-63 ° 5S) accounted for 99.17%, occurred in the polar arc only 0.83%, that is, rare earthquakes; of which 8 earthquakes 98 times at 35 ° N line for the peak. It is also analyzed that in the year 648 - 257, the M ≥ 8 earthquakes in the world mainly concentrated around the 35 ° N line in 1979. In particular, there have been many devastating earthquakes in history near the 35 ° N line. These phenomena may have something to do with the Earth’s rotation.