| Study on the characteristics of earthquake's impact on cities |
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| 作者姓名： | 潘华 赵凤新 高孟潭 |
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| 作者单位： | Institute of Geophysics，China Earthquake Administration，Beijing 100081，China，Institute of Geophysics，China Earthquake Administration，Beijing 100081，China，Institute of Geophysics，China Earthquake Administration，Beijing 100081，China |
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| 基金项目： | A Public Benefit Foundation of the Ministry of Science and Technology of China. |
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| 摘 要： | Introduction With rapid development of national economy, urbanization has been speeded up in China, and several city groups or city belts with extra-large cities as their centers have been formed. For example, Pearl River Delta urbanized area surrounds Guangzhou City, Shenzhen City, Zhuhai City; Yangtze River Delta urbanized area surrounds Shanghai City, Suzhou City, Wuxi City, Nanjing City, Hangzhou City; Beijing-Tianjin-Tangshan urbanized area surrounds Beijing City, Tianjin City…
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Study on the characteristics of earthquake's impact on cities |
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| PAN Hua ZHAO Feng-xin GAO Meng-tan Institute of Geophysics,China Earthquake Administration,Beijing ,China.Study on the characteristics of earthquake''''s impact on cities[J].Acta Seismologica Sinica(English Edition),2004,17(2). |
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| Authors: | PAN Hua ZHAO Feng-xin GAO Meng-tan Institute of Geophysics China Earthquake Administration Beijing China |
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| Institution: | PAN Hua ZHAO Feng-xin GAO Meng-tan Institute of Geophysics,China Earthquake Administration,Beijing 100081,China |
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| Abstract: | Firstly, the impact of historical earthquakes on 34 China province-level capital cities is evaluated by using historical earthquake catalog. The distribution of affected intensity shows, about 53% of cities have even not been affected by earthquake intensity VI, and 44% of cities have been hit by earthquake intensity VII to IX. For most of the cities, occurrence frequency of affected intensity VI is usually higher than that of affected intensity larger than VI, and the value of affected intensity with maximal occurrence frequency may be very different among cities. So both the maximal affected intensity and the affected intensity with maximal occurrence frequency should be taken into account when the prevention seismic intensity needs to be determined. Secondly, considering the incompleteness of records of historical earthquakes, a method of earthquake catalog computer simulation is introduced to study the features of affected intensity of big cities. 69 county-level cities of Fujian Province are selected to be statistical objects. The statistical result shows, for different risk levels the seismic intensity changes greatly among cities, the seismic intensity of 2% probability of exceedance in 50 years can be regarded as the characteristic affected intensity of city, and can be the basis of determining the city special earthquake prevention level and a proper indicator of future earthquakes impact on cities. |
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| Keywords: | city group affected intensity characteristics earthquake probability of exceedance |
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