近10年来陕西省地震时空分布特征
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摘要
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.
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.
引文
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[2]方永安.陕西地震活动规律与活动断裂的关系[J].陕西地质,1997,15(1):72-83.
[3]权新昌.渭河盆地断裂构造结构[J].中国煤田地质,2005,17(3):1-2.
[4]祝意青,王庆良,田勤俭等.关中地区地壳形变综合分析与研究[J].大地测量与地球动力学,2006,26(4):56-57.
[5]胡斌,祝意青,田勤俭,等.关中地区重力场及其时空动态演化特征[J].中国地震,2006,26(2):172-173.
[6]孟智民,张春芳,李少睿.关中陕南地区一些小地震震源参数和环境剪应力的研究[J].华北地震科学,2003,25(2):37-38.
[7]高好林,邵辉成.关中地区重力场动态演化特征与地震活动分析[J].大地测量与地球动力学,2005,25(1):95-97.
[8]胡斌,祝意青,江在森.关中地区垂直形变场及其动态演化特征[J].地震研究,2006,29(2):151-152.
[9]邵辉成,苏刚,张春生,等.关中地区小震活动特征及危险性分析[J].内陆地震,2001,15(3):218-219.
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