摘要
利用安芝的尾波公式,使用单台多震记录分别计算了各个台站周围地壳介质的平均Q值及台站和震中间地壳介质的Q值。结果表明,各地Q值均在100—300之间,只有少数地区超过300,和川滇交界区、昆明地区、宁夏地区相似,属于低Q值地区。定襄—代县、右玉—繁峙、定襄—原平、闻喜—绛县、闻喜—永济、太原—娄烦Q值在300以上;临汾—绛县、临汾—秸山、临汾—洪洞、太原附近次之,其Q值在240以上,其它地区Q值多在150左右。高Q值地区表明该区地壳介质强度大,地震波衰减慢,易于积累应变能。
According to Aki's coda wave formula, the author here has estimated the average Q value of the crustal media around each seismic station and between the station and epicenters in Shan.xi province, respectively, by using single station seismic records. The computed results show that the Q values everywhere are in the range of 100-300, indicating this is a low Q region similar to the boundary area between Sichuan and Yunnan provinces, and to Kunming and Ningxia areas, with an exception of a few areas where Q values exceed 300. The Q values in Dingxiang-Daixian, Youyu-Fanqi, Dingxiang-Yuanping, Wenxi-Jiangxian, Wenxi-Yongji, and Taiyuan-Loufan exceed 300. The Q values are over 240 in Linfen-Jiangxian, Linfen-Jishan, Linfen-Hongdong and the vicinity of Taiyuan, while in most other areas are about 150. The high Q values imply that the strength of the crustal media in those areas is strong where seismic wave attenuation is relatively slow and that it is favourable to strain energy accumulation.
出处
《地震》
CSCD
北大核心
1989年第4期52-57,共6页
Earthquake
