摘要
根据块体内地震受块体边缘地震影响的观点,对汉中与安康盆地的历史及现代地震活动特点、规律进行了讨论和分析。得到这样结果:(1)块体内断陷盆地的地震活动水平将小于块体边界上的地震活动水平;(2)块体内盆地的地震活动,主要受块体边缘较大地震活动的影响,反映块体边界较大地震发生前后其附近构造的调整运动;(3)当与块体内盆地较近的块体交界带上发生大地震时,应注意盆地的地震危险。
Based on the view that the earthquake in a block is subjected to the earthquakes occurred on the margin of the block, the seismicity in Hanzhong and Ankang basin is analyzed. The conclusions are: (1) the level of seismicity in downfaulted basin of a block is lower than that on the boundary of the block; (2) the seismic activity within the basin is mainly influenced by the bigger events occurred on the margin, which reflects the tectonic adjustment near the boundary after the occurrence of strong earthquakes; (3) when a big earthquake occurred in the interface near a basin, the seismic risk in the basin should be cautioned.
出处
《华北地震科学》
2004年第2期18-22,共5页
North China Earthquake Sciences
基金
陕西省青年基金资助
关键词
华南块体
汉中与安康盆地
地震活动特征
地震危险性
South China block
Hanzhong and Ankang basin
characteristics of seismicity
seismic risk
