Abstract
We have collected 432 vertical component records from 45 stations of new CENC (China Earthquake Network Center) in Chinese mainland and adjacent regions. These records were used to calculate Q 0 (Q at 1Hz) and η values of Lg coda from each station by the stack spectral ratio (SSR) method. Then the tomography method was applied to obtaining lateral variation of Q 0 and η values in Chinese mainland and adjacent regions. The result indicates that Q 0 value varies between 150 and 600 in the studied areas. Yunnan, southwest Sichuan, and northwest Myanmar show the lowest Q 0 value (Q 0 510) exists in the border of southern Mongolia, Alxa and Ordos block. The η value varies between 0.45 and 0.75 in Chinese mainland and its adjacent regions.
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