A few important issues for performing nonlinear refraction traveltime tomography have been
identified. They include the accuracy of the traveltime and raypath calculations for refraction …

This efficient multiscale method for time-domain waveform tomography incorporates filters
that are more efficient than Hamming-window filters. A strategy for choosing optimal …

Geophysical subsurface investigations use the principles of physics to unravel intrinsic
Earth's subsurface features and nature of the underlying geology. Over the past two …

We develop a rapid nonlinear travel time tomography method that simultaneously inverts
refraction and reflection travel times on a regular velocity grid. For travel time and ray path …

Seismic refraction method is a geophysical method that has been developed for shallow
subsurface investigation. It provides 2-dimensional profiles including depth and distance …

地震全波形反演(Full Waveform Inversion) 利用地震波场的运动学和动力学信息建立地层速度
模型, 能够精确刻画模型细节, 成为近年来的研究热点. 本文对日渐成熟的时间域全波形反演方法 …

First-arrival traveltime tomography is one of the most used velocity model building
techniques especially in sparse wide-angle acquisitions for deep crustal seismic imaging …

The objective of the present study was to assess the deterioration in groundwater quality
due to saline water intrusion in the Ad-Darb region of southwestern Saudi Arabia. An …

This book presents the theory of machine learning (ML) algorithms and their applications to
geoscience problems. Geoscience problems include traveltime picking of seismograms by a …

A new wave-equation–based prestack seismic processing system is proposed. This system
has only two essential elements; velocity analysis and depth migration. This approach …