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地震现象地震俗说地动,就是我们居住的地方忽然摇晃起来了。它与日蚀、月蚀、台风、暴雨、洪水、冰雹、寒流、霜冻……等一样,是一种经常发生的自然现象。地球上每年约发生地震五百万次,其中大部分是轻微震动,人感觉不出来,用仪器才能记录到。从历史记载看,人能感觉到的有五万次左右,破坏性大地震全世界每年只有十几次,而且大部分发生在大洋里或人烟稀少的山区,发生在陆地上人口稠密的地方就更少。
Seismic phenomena Earthquake vulgarity that we live in a sudden shaking up. Like eclipses, lunar eclipses, typhoons, torrential rains, floods, hail, cold currents, frosts ... it is a natural phenomenon that often occurs. About 5 million earthquakes occur each year on Earth, most of them are slight vibrations, and people can not feel it and can record them with instruments. From historical records, people can feel about 50,000 times, the devastating earthquakes a year only a dozen times a year, and most occurred in the ocean or sparsely populated mountainous areas occurred in densely populated areas even more less.