Image Fusion for Travel Time Tomography Inversion

Travel Time Inversion in Seismic Tomography

The word tomography finds its origins in the two Greek words tomos, meaning section, and graphy, which translates as drawing. There are many different types of tomography used in many sciences such as medicine, biology, materials science and geology. The basic idea of tomography in all of its uses is to obtain a cross-section of an object which will then be used to infer various facts regarding...

Full waveform inversion guided by travel time tomography

Full waveform inversion (FWI) is a process in which seismic data in time or frequency domain is fit by changing the velocity of the media under investigation. The problem is non-linear, and therefore optimization techniques have been used to find a geological solution to the problem. The main problem in fitting the data is the lack of low spatial frequencies. This deficiency often leads to a lo...

Sharp boundary inversion in crosswell travel-time tomography

Abs tract The reconstruction of seismic images of the medium from cross we ll travel-time data is a typic al examp le of the ill-posed inverse prob lem. In order to obt ain a stable so lution and to rep lace an ill-posed problem by a well-posed one, a stabilizing functiona l (stabilizer) has to be introduced. The ro le of this functional is to select the desired stable so lution from a class of...

Genetic Algorithms for Seismic Travel-Time Inversion

This paper attacks the problem of seismic travel-time inversion using genetic algorithms. Seismic surveying is usually a precondition to engineering and construction work in an area and travel-time inversion is a method of deducing sub-surface features from the measured travel-times of seismic waves. We consider both the one-dimensional and two-dimensional versions of the problem and explore di...

Time-dependent stochastic inversion in acoustic travel-time tomography of the atmosphere