论文标题
重新检查地震阶段椭圆度校正
A Re-examination of Ellipticity Corrections for Seismic Phases
论文作者
论文摘要
地球的椭圆形对远距离震荡距离的地震波的旅行时间有影响。地震学家已经使用了几十年的椭圆度校正和系数表，但是由于使用地震阶段的变化和复杂性的增加，目前的椭圆性系数表已过时且不完整。我们提出了一个Python软件包，即Ellipticipy，以计算椭圆度校正，该校正校正了，该校正校正了在离散的源深度和地下距离下取消对预计数系数的依赖。椭圆机还促进了其他行星体上椭圆校正的计算。当应用于地球和火星时，椭圆度校正的幅度是单秒的顺序，对于地球上的某些地震研究很重要，但由于其他更大的不确定性来源，在火星上仍然可以忽略不计。
The Earth's ellipticity of figure has an effect on the travel times of seismic waves over teleseismic distances. Tables of ellipticity corrections and coefficients have been used by seismologists for several decades, however due to the increasing variety and complexity of seismic phases in use, current tables of ellipticity coefficients are now outmoded and incomplete. We present a Python package, EllipticiPy, for the calculation of ellipticity corrections that removes the dependence on pre-calculated coefficients at discrete source depths and epicentral distances. EllipticiPy also facilitates the calculation of ellipticity corrections on other planetary bodies. When applied to both Earth and Mars, the magnitudes of ellipticity corrections are on the order of single seconds and are significant for some seismic studies on Earth but remain negligible on Mars due to other greater sources of uncertainty.
