地震活动的月相效应

本文利用中国大陆１９１０年以来６．０级以上和首都圈地区１９６６以来１．０级以上大量地震资料，对地震活动的月相效应进行了研究。结果表明，发生在各个月相上的地震频次明显受月相的调制和制约，并且有一定的规律性，月相效应的最大幅度可影响地震活动平均频次的２５％以上，证明了地震活动的月相效应明显存在，其影响不可忽略。结果还表明，月相效应的基本特征是具有半月和全月周期性，此外，对首都圈地区地震活动以及唐山，邢

THE EFFECT OF LUNAR PHASE ON SEISMICITY

Based on a large amount of earthquake records with magnitude M>6.0 occurred in the mainland of China since 1910 and events M > 1.0 in the Capital area since 1966, the authors studied the effect of lunar phase associated with seismicity. The results show that the earthquake sequence at each lunar phase was obviously affected and modulated by the lunar phase, indicating a certain regularity. More than 25 percent of the average frequency of seismicity may be affected by the maximum amplitude of lunar phase, proved the existence of the lunar phase effect of seismic activity. This influence can't be neglected. The results also show that the basic feature of the lunar phase effect is the periodity of half month and one month. Besides, one fourth month period seems to be remarkable for the aftershock sequences of Tangshan and Xingtai earthquake. The frequency and strength of seismic activity will reach the relative limitation around the new moon, full moon, first and last quarters.