基于理论走时表的震相研究

对理论震相走时表，包括震相走时、震中距及震源深度之间的变化规律进行研究。结果表明，每个理论震相走时随震中距或震源深度的变化并不完全一致，存在正相关或负相关，同时部分震相走时受震中距或震源深度的影响会在某处截断。借助这些规律可以快速分析地震事件。

Analysis of Seismic Phase Based on Theoretical Travel Time Table

We explore the relations among the phase travel time, epicentral distance and focal depth by using theoretical seismic phase travel time tables. Results show that seismic phase varies when changing the epicentral distance or focal depth, there exists positive or negative correlations between them, and part of seismic phase travel time will truncate as epicentral distance or focal depth increases. These laws can offer a convenient approach to analyze the earthquake event.