中国西南地区强震烈度衰减模型的研究
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摘要
本文将研究范围限定在西南地区,因其具有相似地形地貌特征和发震构造的区域,并选取1913年以来6.5级以上的典型震例作为研究对象,通过对数据的分析统计,得到了传统的烈度衰减椭圆模型不适用于7.0级以上强震的结论;根据烈度区域面积与震级、破裂长度与震级以及缓冲区分析的方法得到了更加符合强震烈度衰减规律的断层距模型;在面积统计关系对比和实际烈度分布的综合对比中,得到了适用于强震的较为合理的烈度衰减模型,并根据本文得到的烈度衰减规律,结合ArcGIS二次开发,编写了用于快速绘制等震线的控件。本文的研究结果对于震后快速评估和地震应急有着现实意义。
In this paper,the study area is restricted area of similar topography and seismogenic structure in Southwest China.Taking earthquakes above M6.0 in the recent 100 years as the research object,and finally through analyzing the statistical data,we draw the conclusion that the traditional intensity attenuation elliptical model can not be applied to strong earthquakes above M7.0.Meanwhile,based on the analysis of the relation between intensity area and magnitude,of the relation between rupture length and magnitude,and of the buffer area.We present a fault distance model more applicable to the strong seismic intensity attenuation law.Through the comparison of area statistical relationship and actual intensity distribution,we also obtain a more reasonable intensity attenuation model applied to strong earthquakes.Based on the intensity attenuation model,combined with ArcGIS secondary development,we developed a control software to be used in drawing isoseismal quickly and can help a lot in fast aftershock assessment and earthquake emergency drill.
In this paper,the study area is restricted area of similar topography and seismogenic structure in Southwest China.Taking earthquakes above M6.0 in the recent 100 years as the research object,and finally through analyzing the statistical data,we draw the conclusion that the traditional intensity attenuation elliptical model can not be applied to strong earthquakes above M7.0.Meanwhile,based on the analysis of the relation between intensity area and magnitude,of the relation between rupture length and magnitude,and of the buffer area.We present a fault distance model more applicable to the strong seismic intensity attenuation law.Through the comparison of area statistical relationship and actual intensity distribution,we also obtain a more reasonable intensity attenuation model applied to strong earthquakes.Based on the intensity attenuation model,combined with ArcGIS secondary development,we developed a control software to be used in drawing isoseismal quickly and can help a lot in fast aftershock assessment and earthquake emergency drill.
引文
[1]汪素云,俞言祥.中国分区地震动衰减关系的确定[J].中国地震,2000,16(2):99-106.
[2]雷建成,高孟潭,俞言祥.四川及邻区地震动衰减关系[J].地震学报,2007,29(5):500-511.
[3]孙继浩.川滇及邻区中强地震烈度衰减关系的适用性研究[D].北京:中国地震局地震预测研究所,2011.
[4]陈培善,刘家森.用位错模型研究震级与烈度关系[J].地球物理学报,1975,18(3):183-185.
[5]孟宪东,龚平,金赤兵.用烈度衰减的椭圆模型标度华北地区历史地震震级[J].东北地震研究,1987,3(3):27-35.
[6]龙锋,闻学泽,徐锡伟.华北地区地震活断层的震级-破裂长度、破裂面积的经验关系[J].地震地质,2006,28(4):511-535.
[7]孙继浩,帅向华.川滇及其邻区中强地震烈度衰减关系适用性研究[J].地震工程与工程振动,2011,31(1):11-18.
[8]张建福,成小平,姜立新,等.基于面积统计的震后烈度评估[J].自然灾害学报,2005,14(1):76-81.
[9]席楠,姜立新.基于ArcGIS Server的地震应急数据与服务共享研究[J].地震,2011,31(1):136-145.
[10]陈强,姜立新,帅向华.Google Earth在地震应急中的应用[J].地震,2008,28(1):122-128.
[2]雷建成,高孟潭,俞言祥.四川及邻区地震动衰减关系[J].地震学报,2007,29(5):500-511.
[3]孙继浩.川滇及邻区中强地震烈度衰减关系的适用性研究[D].北京:中国地震局地震预测研究所,2011.
[4]陈培善,刘家森.用位错模型研究震级与烈度关系[J].地球物理学报,1975,18(3):183-185.
[5]孟宪东,龚平,金赤兵.用烈度衰减的椭圆模型标度华北地区历史地震震级[J].东北地震研究,1987,3(3):27-35.
[6]龙锋,闻学泽,徐锡伟.华北地区地震活断层的震级-破裂长度、破裂面积的经验关系[J].地震地质,2006,28(4):511-535.
[7]孙继浩,帅向华.川滇及其邻区中强地震烈度衰减关系适用性研究[J].地震工程与工程振动,2011,31(1):11-18.
[8]张建福,成小平,姜立新,等.基于面积统计的震后烈度评估[J].自然灾害学报,2005,14(1):76-81.
[9]席楠,姜立新.基于ArcGIS Server的地震应急数据与服务共享研究[J].地震,2011,31(1):136-145.
[10]陈强,姜立新,帅向华.Google Earth在地震应急中的应用[J].地震,2008,28(1):122-128.
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