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西安市位于共中平原中部的渭河南岸,许多人在研究了西安地区当今的地壳活动的基础上,从地质构造学观点对西安地区的地震提出了许多看法,认为西安属于相对活动区,历史上地震烈度最大为9度。地震主要分布在东部边缘和靠南一侧,其中四级以上的地震主要集中在长安—西安—临潼—华县一带及东部边缘,地震的震源深度多在20—30公里的范围内。据历史记载,从公元前1177年至1985年5月,关中盆地(含渭北、陇宝)发生四级以上的地震45次,其中西安地区就有19次。近几十年西安未发生过四级以上的地震,但四级
Xi’an is located on the south bank of the Weihe River in the central part of the Gongzhong Plain. Based on the current crustal activities in Xi’an, many people put forward many views on the earthquake in Xi’an from the viewpoint of geological tectonics. They think that Xi’an belongs to the relative active area. Historically The maximum earthquake intensity is 9 degrees. The earthquakes are mainly distributed on the east edge and the south side. The earthquakes above Grade 4 and above are mainly concentrated in the Chang’an-Xi’an-Lintong-Huaxian area and the eastern edge. The depth of the earthquakes is mostly in the range of 20-30 km. According to historical records, from 1177 BC to May 1985, there were 45 earthquakes of magnitude four or more in the Guanzhong Basin (including Weibei and Longbao), of which 19 were in Xi’an. In recent decades, Xi’an has not occurred more than four earthquakes, but four