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为提高天然地震折射与反射速度CT的精度,我们运用“走时最小纵横波速度层析成像”与“波形基本解纵横波速度层析成像”相结合的方法,反演各层界面形状及各层纵波、横波速度。反演结果图与“正演地球模型剖面图”基本一致。本文在数学上发展了“层析成像”的内容,提出“波形基本解纵横波速度层析成像”基本概念,是天然地震简单模型实验的初步尝试,偏重于理论研究,其理论和方法有一定参考价值。天然地震比人工地震复杂,模型实验不足之处,与实际应用有距离,后续论文将给予补充并处理实际天然地震资料。
In order to improve the accuracy of refraction and reflection velocity CT of natural earthquakes, we use a combination of “traveltime minimum P-wave velocity tomography” and “basic wavefront resolved S-wave velocity tomography” Shape and layers of longitudinal wave, shear wave velocity. The inversion result map is basically the same as the “Forward Earth Model Section”. This paper develops the content of “tomography” mathematically, and puts forward the basic concept of “fundamental waveform fundamental wave decomposition tomosynthesis imaging”, which is a preliminary attempt to experiment on simple models of natural earthquakes. It emphasizes theoretical research and its theory And methods have some reference value. Natural earthquakes are more complicated than artificial earthquakes and have inadequate experimental models. They are far away from practical applications. Subsequent essays will supplement and process actual natural seismic data.