摘要
本文利用 12 7次地震等震线资料 ,对云南地区地震烈度衰减特征进行了研究 ,其结果表明 :(1)云南地区地震烈度极震区等震线的长轴、短轴之比的均值 ,高于我国东部地区而略低于西部地区的平均值 ,烈度衰减方向性强。 (2 )云南地区地震烈度衰减分区特征明显。 (3)与我国西北、华北地区低震级档的各烈度等震线长、短轴之比值均高于高震级档的比值现象相比 ,云南地区这种比值关系要复杂得多。本文还对有关的问题进行了讨论。
The research on attenuation features of intensity in the Yunnan region by using intensity isoseismals of 127 earthquakes, and the following three conclusions have been put forward:(1)Average ratio values of long |axis to short |axis of innermost isoseismal in the Yunnan region is larger than eastern China and smaller than western China. The velocity of intensity attenuation varies in different directions.(2)The Yunnan region is divided into three areas according to geological setting and structural factor,etc. and the attenuation relationship of intensity differs manifestly.(3) In the Northwest China and North China,the ratios of long |axis to short |axis of the low-magnitude isoseismals are larger than those of big magnitude.Comparing with that phenomenon,the ratios in the Yunnan region are more complicated. Finnally, some relative questions are discussed.
出处
《中国地震》
CSCD
北大核心
2003年第3期287-294,共8页
Earthquake Research in China
基金
云南省自然科学基金课题 (2 0 0 0D0 0 2 8Q)资助
关键词
地震烈度
衰减差异
相关问题
Earthquake intensity Attenuation difference Relative questions
