近10年来陕西省地震时空分布特征

The Study of Shaanxi Earthquakes since 2001

依据国家地震科学数据共享中心和陕西地震信息网实测资料,对2001年以来陕西省地震的全部数据进行分析,采用统计、比较、图示等研究方法揭示其在空间和时间上的分布规律和特征。研究结果表明陕西省近10年来共发生地震846次,其中3级以上地震87次,平均每年10次左右,处于长期平静过程中的相对活跃期,但以中小震为主。2008年主要是受汶川大地震及其余震的影响,陕南地震发生频率较高。陕西地震在地域分布上主要集中在关中和陕南地区,陕北地区地震的发生次数比较少。

According to the records of China Earthquake Data Center and the earthquake information,the article analyses the earthquake data of Shaanxi since 2001.Using the statistics,contrast,diagram and other research methods,the earthquake’s spatial-temporal feature has been reveoled.From the research,the article indicates that there have been 846 times of earthquakes,87 times above the 3 magnitude,with 10 times on average in each year.Since 2001,most of the earthquake were levels,but due to the Wenchuan earthquake and the aftershock which happened in 2008, the earthquakes of Shaanxi were of a high frequency. The earthquake region of Shaanxi is distributed in the Guanzhong plain and the southern area of Shaanxi. It is of low frequency of earthquakes in the northern area of Shaanxi.