全世界每年要发生12000次2级以上的地震,其中6.5级以上的大地震100次左右。但地球两瑞的南北极地区至今从未发生过任何级别的地震。科学家们认为:南北极地区巨大的冰层是造成南极大陆和北极的格陵兰岛内陆地区没有发生任何地震的主要原因。 在南北极地区,由于终年冰雪覆盖,冰层极厚。据测算,冰层达到了这些地区总面积的80％～90％。厚大的冰层对于底部产生了很大的压力。 There are 12,000 earthquakes of magnitude 2 or above every year in the world, of which about 100 are earthquakes of magnitude 6.5 or above. However, no earthquakes of any magnitude have ever occurred in the Arctic and Antarctic regions of Earth and Switzerland. Scientists believe that the huge ice sheets in the Arctic and Antarctica are the main causes of no earthquakes in the interior of Greenland that cause the Antarctic continent and the Arctic. In the polar regions, the ice layer is extremely thick due to the year-round snow and ice cover. It is estimated that the ice reaches 80% to 90% of the total area in these areas. Thick ice creates a lot of pressure on the bottom.