| Study on the Attenuation Features of Earthquake Intensity in the Yunnan Region |
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| 引用本文： | Li Shicheng. Study on the Attenuation Features of Earthquake Intensity in the Yunnan Region[J]. 中国地震研究, 2004, 18(1): 79-87 |
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| 作者姓名： | Li Shicheng |
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| 作者单位： | EarthquakeAdministrationofYunnanProvince,Kunming650041,China |
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| 基金项目： | Sortoftheproject:fundedbytheNaturalScientificFoundationofYunnanProvince (2 0 0 0D0 0 2 8Q)，China . |
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| 摘 要： | This research on the attenuation features of intensity in the Yunnan region has been conducted by using intensity isoseismals of 127 earthquakes, and the following three conclusions have been put forward : ( 1 ) The average ratio value of long axis to short axis of innermost isoseismals in the Yunnan region is larger than that of eastern China and smaller than that of western China.The velocity of intensity attenuation varies in different directions; (2) The zoning feature of intensity attenuation in the Yunnan region is obvious; (3) In Northwest China and North China, the ratios of long axis to short axis of low-magnitude isoseismals are larger than those of high magnitude ones. Compared with that phenomenon, the ratios in the Yunnan region are more complicated. Finally, some relevant questions are discussed.
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| 关 键 词： | 地震强度 衰减均衡 等震线 云南 |
Study on the Attenuation Features of Earthquake Intensity in the Yunnan Region |
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| Li Shicheng. Study on the Attenuation Features of Earthquake Intensity in the Yunnan Region[J]. Earthquake Research in China, 2004, 18(1): 79-87 |
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| Authors: | Li Shicheng |
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| Affiliation: | Earthquake Administration of Yunnan Province, Kunming 650041, China;College of Earth & Space Sciences, University of Science and Technology of China, Hefei 230026, China |
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| Abstract: | This research on the attenuation features of intensity in the Yunnan region has been conducted by using intensity isoseismals of 127 earthquakes, and the following three conclusions have been put forward: (1) The average ratio value of long axis to short axis of innermost isoseismals in the Yunnan region is larger than that of eastern China and smaller than that of western China. The velocity of intensity attenuation varies in different directions; (2) The zoning feature of intensity attenuation in the Yunnan region is obvious; (3) In Northwest China and North China, the ratios of long axis to short axis of low magnitude isoseismals are larger than those of high magnitude ones. Compared with that phenomenon, the ratios in the Yunnan region are more complicated. Finally, some relevant questions are discussed. |
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| Keywords: | Earthquake intensity Attenuation difference Relative questions |
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