Active seismic tomography. Theory and applications / Активная сейсмотомография. Теория и применение

The seismic method is one of the most promising geophysical methods that can help to explore the Earth’s interior. Numerous technology developments have been introduced in seismic methods over the decades to either understand or to use the full recorded seismic data from the field. Seismic tomography is a seismic imaging technique used to delineate the subsurface linked with structures and numerical values of different physical parameters such as the seismic velocity, density, etc.Seismic tomography has grown from a very simple to a complex scenario, i.e., at first, we started to use traveltime data alone for seismic imaging in seismic tomography. Over the decades, seismic tomography has evolved to exploit comprehensive components such as traveltime, amplitudes, frequencies, etc. of the seismogram. This all happened because of tremendous advancements in computer technologies; however, successful applications of full waveform tomography are still very limited, and more understanding of challenges like cycle-skipping, selection of suitable norms, frequency bands, and implementation to 3D domains is needed. <...>