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在成功预报的海城地震之后发生的唐山地震,为什么未能预报?这是大家十分关心的问题.地震一般发生在15公里左右的地壳中,人类目前还无法直接探测震源深处的情况;一个大地震在同一地区重复发生的周期在百年甚至千年以上,人们从事地震预报实践的机会很少;另外,地震预报是世界上的科学难题之一,甚至比癌症更难攻克.自1966年邢台地震以来,我国开展了地震预报的探索和研究,已取得海城、松潘等大地震和南黄海地震安全预报的成功事例,预报水平处在世界前列.但是,预报尚处在探索、经验阶段,人们还没有认识和掌握地震孕育、发展、发生的规律,未能找到震前必然出现而无震情况下不出现的“必震前兆”,未能掌握不同震型、不同地区的地震前兆规律.因此,目前的预
Why did not the Tangshan earthquake that occurred after the successful prediction of Haicheng earthquake be a problem of great concern? The earthquakes generally occurred in the crust of about 15 kilometers. At present, humans can not directly detect the depths of the earthquakes. Earthquake in the same area repeated in the cycle of a century or even more than a thousand years, people engaged in earthquake prediction practice rarely; In addition, the earthquake prediction is one of the world’s scientific problems, and even more difficult to overcome than cancer.From the 1966 Xingtai earthquake Since our country started the exploration and research of earthquake prediction, the success stories of Haicheng and Songpan large earthquakes and the safety prediction of the South Yellow Sea earthquake have been obtained, and the prediction level is at the forefront of the world. However, the prediction is still in the stage of exploration and experience, and people Earthquake did not recognize and grasp the law of birth, development, occurrence, failed to find the pre-earthquake and no earthquake will occur under the “earthquake precursory”, failed to grasp the different types of earthquake precursors in different regions. , The current pre-set