地売中多次反射波pPM、pPM2的初步研究

天然地震图上,在P、Pn波的干涉带之后的继至震相中,还有许多未知震相,研究这些波的性质对减少震相分析错误、认识地壳结构和测定震源深度都有着重要意义。

PRELIMINARY STUDY OF MULTIPHE RELECTION WAVES pPM,pPM2 IN THE CRUST OF THE EARTH

In the paper,we extend the time-distance equation of multiple reflection waves produced by surface earthquake source in homogeneous single layer medium with inclined boundary plane in seismic exploration to any depth of the focus, put forward a time-distance equation group of multiple reflection waves in laterally homogeneous single layer medium in which the velocity is linear correlation with depth and whose boundary plane is slant, and discuss the,relatioiiship between the ground displacement and the epicentral distance for multiple reflection waves.