Science. 1968 Sep 13;161(3846):1127-9. doi: 10.1126/science.161.3846.1127.
Observational evidence is presented in support of the hypothesis that large earthquakes excite the earth's natural wobble and produce the observed secular polar shift. Previous theoretical calculations based on elasticity theory and earthquake statistics had predicted a significant effect. There appear to be some premonitory signs of large earthquakes in the pole path.
观测证据支持这样一种假设，即大地震会激发地球的自然摆动，并产生观测到的长期极移。先前基于弹性理论和地震统计的理论计算预测会产生重大影响。在极移路径中似乎存在一些大地震的前兆迹象。
