Seismic measurements of traveltime and amplitude define the subsurface geometry and give estimates of the acoustic impedances related to rock velocities and densities.
如果我们测得地震波的走时和振幅，我们就能够确定地下的几何形状并估算与岩石速率和密度有关的声阻抗。
2
GABWIT is a software of inversion for 3d crustal velocity structure using seismic body traveltime data and genetic algorithms.
GABWIT是应用地震体波走时资料、遗传算法反演地壳三维速度结构的软件。
3
This paper, using the least traveltime and SIRT method, study on the seismic tomography of stress abnormal in coal field. These have some theoretical and practical values.