摘要
本文用北京台网26个地震台记录到的52个地震的250多个尾波记录资料,求出了京、津、张、唐地区尾波Q_0的分布。得到该地区的Q_0值在90—350之间。分析对比的结果表明:Q_0值的分布与该地区的P波速度结构相当一致。唐山7.8级地震及三河8.0级地震发生在Q_0变化较大而数值相对较低的地区,其它6级以上历史地震的震中绝大部分都在Q_0约为100的低值区。
The distribution of coda Q0 in the Beijing-Tianjin-Zhangjiakou- -Tangshan region is obtained from more than 250 coda records of 52 earthquakes recorded at 26 stations. The Q0 values in this region range from 90 to 350. The analytical results show that the Q0 value distribution is quite consistent with the velocity structure of P-wave in this region. Both the Tangshan earthquake (M 7.8) and the Sanhe earthquake (M 8.0) occurred in regions where Q0 values change greatly but are relatively low. Most other epicentres of historical earthquakes with M≥6 located in regions with low Q0 values of about 100.
出处
《地震》
CSCD
北大核心
1990年第2期12-20,共9页
Earthquake
