中国地震速报台网走时残差分析与走时修正

Residual analysis and arrival time correction for the China Prompt Network

使用了３０个速报台站的观测数据，计算了１００多个中国境内外的地震事件初至波走时残差。在此基础上分析各台所记录的所有地震事件的残差随方位角和震中距的分布，及产生这些残差的地球深部非流体静力平衡状态和地球表面构造等方面的原因，并给出了不同区域地震走时的平均校正值，从而提高了地震定位精度。

Using the observation data from 30 prompt stations,we calculated the arrival time resduals for 100 events occurred inside China and outside.Based on the above results,we analyzed the residual distribution with azimuthe and epicenter distance,discussed,from the viewpoints of the equilibrium of nonstatic forces and the earth surface structure,the reason why those residuals exist,and proposed the average correction for different regions,by which the precision of event locations can be improved.