1976年7月28日,河北省唐山地区发生了7.8级大地震,这场突如其来的灾难发生在人们熟睡时刻——凌晨3时56分,人们猝不及防,造成了巨大的人员伤亡和经济损失。地震发生在午夜后是偶然的吗?请看统计资料:1966年邢台大地震发生在清晨5时29分;1974年昭通大地震发生在凌晨3时25分……我国每次发生的5级以上地震,有80％以上发生在夜间。那么,地震为什么多发生在夜间呢? 这一问题,科学工作者普遍认为与月球的引力有关。月球的引力可引起海洋潮汐,其实这种现象并 On July 28, 1976, a magnitude 7.8 earthquake hit Tangshan, Hebei Province. The sudden disaster happened at a time when people were asleep - 3:56 am. People caught off guard and caused huge casualties and economic losses. Earthquake occurred after midnight by chance? See statistics: 1966 Xingtai earthquake occurred at 5:29 in the morning; 1974 Zhaotong earthquake occurred at 3:25 in the morning ...... Each of our country occurred more than 5 More than 80% of earthquakes happen at night. So, why do earthquakes happen at night? This problem is generally believed by scientists as the gravity of the moon. The moon's gravity can cause oceans tides, in fact, this phenomenon and