地震预报是地震工作者长期以来的愿望,但是由于地震发生的复杂性,本世纪60年代以前,进展一直比较缓慢。日本虽是开展地震研究比较早的国家,但是直到1964年新潟7.5级地震后,才制定了地震预报研究的五年计划,以后又陆续制定了第二和第三个预报研究计划; Earthquake prediction is a long-term desire of earthquake workers, but progress has been slow until the 1960s due to the complexity of earthquakes. Although Japan was the country where earthquake research was relatively early, it did not make a five-year plan of earthquake prediction study until the Niigata earthquake of magnitude 7.5 in 1964, and later developed the second and third forecast research plans.