基于PTD方法测定辽宁地区震源深度

Application of PTD Method in Determination of Liaoning Focal Depth

通过使用PTD方法重新测定辽宁地区2013年以来ML≥3.0地震的震源深度,对辽宁地区震源深度的频次统计特征、优势分布特征和空间分布加以分析研究。结果证明,与单纯形法编目结果对比,PTD方法测定的震源深度分布更加集中,能够更好的反映发震层。辽宁地区的震源深度97%分布在6~16km范围,平均震源深度10.1km,呈现正态分布特征,且有北浅南深的趋势。

Determination of source depth of Ml≥3.0 earthquake since 2013 in Liaoning region by PTD method.This paper analyse the frequency statistics,dominant distribution and spatial distribution of focal depth in Liaoning area.The results show that the depth distribution of focal source measured by PTD method is more concentrated and reflects the seismic layer better than that of simple cataloguing method.The focal depth in Liaoning area shows the vertical distribution characteristic of columnar,and has the trend of North shallow South depth.