地震振动着沿海城市,同时释放出在下伏大陆板块中积累的能量。板内能量的积累是由于大陆板块与在近海消减带处潜入大陆之下的大洋板块间的摩擦的结果。但是,当人们将注意力集中于震区时,使地壳遭受破坏的表面波会缓慢传播出去,最终可能在海洋触发另一次地震。以上观点是美国华盛顿卡内基学会的两位地球物理学家赖德勒克和萨克斯(Paul A.Rydelek and I.Selwyn Sacks)根据1600年以来日本东北部的地震记录资料提出的。他们分析了46次陆地地震和50次海震(各次地震的里氏震级至少为6.5)的走时和位置后推测,发生在陆地的地震平均36年之后触发了海洋之下 Earthquakes vibrate the coastal cities and at the same time release the energy accumulated in the underlying continental plate. The accumulation of energy in the plate is the result of friction between the continental plate and the oceanic plate beneath the mainland at the subducting zone off the coast. However, as people focus their attention on the earthquake zone, surface waves that destroy the crust can propagate slowly, eventually triggering another earthquake in the ocean. The above point of view is based on the seismological records of northeastern Japan since 1600 by two geophysicists Paul A. Rydelek and I. Selwyn Sacks of the Carnegie Institution of Washington in the United States. They analyzed the travel time and location of 46 earthquakes and 50 earthquakes (with a magnitude of at least 6.5 for each earthquake) postponed and predicted that earthquakes occurring on land triggered an average of 36 years after the oceans