全世界每年要发生12 000次2级以上的地震,其中6.5级以上的大地震100次左右,但地球两端的南北极地区至令从未发生过任何级别的地震。科学家们认为:南北极地区的巨大冰层是造成南极大陆和北极的格陵兰岛内 There are about 12,000 earthquakes of magnitude 2 and above every year in the world, of which there are about 100 earthquakes of magnitude 6.5 and above. However, no earthquakes of any magnitude have ever occurred at both polar regions of the globe. Scientists hold the view that the huge ice sheets in the Arctic and Arctic regions are within Greenland that cause the Antarctic continent and the Arctic