中国地震发生频率与烈度的空间分布

英文篇名：Spatial Distribution of Earthquake Frequency and Seismic Intensity in China
中文刊名：地理科学进展
英文刊名：Progress in Geography
作者：刘凯 ; 廖顺宝 ; 张赛
英文作者：LIU Kai1 ; 2 ; LIAO Shunbao1 ; ZHANG Sai1 ; 2 (1. Institute of Geographic Sciences and Natural Resources Research ; CAS ; Beijing 100101 ; 2. Graduate University of Chinese Academy of Sciences ; Beijing 100049)
中文关键词：地震目录 ; 地震频率 ; 地震烈度 ; 空间化 ; GIS
英文关键词：seismic catalog ; earthquake frequency ; intensity ; spatialization ; GIS
出版日期：2008-05-15
机构：中国科学院地理科学与资源研究所,中国科学院地理科学与资源研究所,中国科学院地理科学与资源研究所北京100101,中国科学院研究生院,北京100049,北京100101,北京100101,中国科学院研究生院,北京100049
年：2008
期：03
出版单位：地理科学进展

摘要

考虑不同区域地震记录具有时间长度不等的特点,对"震中分布分震级网格点密集值"算法进行改进,结合GIS的空间分析方法将地震目录中的点数据空间化为能反映地震发生频率的栅格数据;依据地震震级和烈度的关系以及地震烈度在空间上的椭圆衰减模型,选择逼近和近似的计算手段,并结合空间插值方法得到中国地震烈度分布的栅格图。从地震频率分布结果上看,大致以宁夏、甘肃、四川和云南为界,中国西部地区3级以上的地震发生频率要高于东部地区;从地震烈度分布结果看,中国甘肃、陕西、宁夏、山西、河北、四川、云南等位于地震带内的区域在发生地震时产生的烈度较高。
Based on the data in seismic catalog , the characteristic of unequal time periods in different areas is considered in the spatialization of earthquake frequency. "Value of grid nodes density calculating of earthquake epicenter distribution group by magnitude" method is improved to spatialize point data to grids which describe earthquake frequency from the seismic catalog with the assistance of GIS spatial analysis methods. Furthermore, according to the relationship between earthquake magnitude and intensity and the model of elliptical attenuation of earthquake intensity, spatial interpolation method, approximation method and approaching method are chosen to obtain grids which describe the average seismic intensity in China. The results of earthquake frequency distribution in China indicates that the frequency of earthquake magnitude above 3 in western China is higher than that of the eastern China bounded by a strip which consists of Shanxi, Ningxia, Gansu, Sichuan and Yunnan provinces. It is concluded from the results of seismic intensity distribution in China that Gansu, Shanxi, Ningxia, Hebei, Sichuan and Yunnan provinces, which are located in seismic belts, are likely to encounter earthquakes that often cause higher intensity.

引文

[1]赵庆良,许世远,王军等.沿海城市风暴潮灾害风险评估研究进展.地理科学进展,2007,26(5):32～40.
    [2]原国锋.四川汶川地震已造成68516人遇难.人民日报,2008年5月30日第二版.
    [3]傅伯杰,牛栋,于贵瑞.生态系统观测研究网络在地球系统科学中的作用.地理科学进展,2007,26(1):1～16.
    [4]王健.地震活动性图象处理的网格点密集值计算方法.地震学报,2001,23(3):262～267.
    [5]秦承志,裴韬,周成虎等.基于数学形态学的地震带图像识别分析.地球信息科学,2004,6(2):101～105.
    [6]Howell B F,T R Schultz.Attenuation of modified Mercalli intensity with distance from the epicenter.Bulletin of the Seismological Society of America,1975,65:651～665.
    [7]Anderson J G.The attenuation of Modified Mercalli Intensity with distance in the United States.Bulletin of the Seismological Society of America,1978,68(4):1147～1179.
    [8]Chandra U.Attenuation of intensities in the United States.Bulletin of the Seismological Society of America,1979,69(6):2003～2024.
    [9]汪素云,俞言祥,高阿甲等.中国分区地震动衰减关系的确定.中国地震,2000,16(2):99～106.
    [10]国家地震局.中国地震烈度区划图(1990)概论.北京:地震出版社,1996.
    [11]周成虎,裴韬,李全林等.集成地震目录数据库及其应用研究.北京:中国水利水电出版社,2005.
    [12]黄健元.计算方法.南京:河海大学出版社,2004.