Applications of seismic travel-time tomography
نویسندگان
چکیده
منابع مشابه
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...
متن کاملAdaptation of Back Projection Tomography to Seismic Travel Time Problems
A back projection method of reconstruction is adapted to invert seismic travel time data for velocity structure. Adaptations are made so that the inhomogeneous and anisotropic ray sets and the threedimensional geometries commonly dealt with in seismic experiments can be handled with greater success. Jacobi iteration, deconvolution, and ray weighting work well in augmenting the basic back projec...
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Current geophysical techniques for visualizing seismic activity employ image reconstruction methods that rely on a centralized approach for processing the raw data captured by seismic sensors. The data is either gathered manually, or relayed by expensive broadband stations, and then processed at a base station. This approach is time-consuming (weeks to months) and hazardous as the task involves...
متن کاملWave-equation-based travel-time seismic tomography – Part 1: Method
In this paper, we propose a wave-equation-based travel-time seismic tomography method with a detailed description of its step-by-step process. First, a linear relationship between the travel-time residual 1t = T − T syn and the relative velocity perturbation δc(x)/c(x) connected by a finite-frequency travel-time sensitivity kernel K(x) is theoretically derived using the adjoint method. To accur...
متن کاملContinuous Monitoring of Crosswell Seismic Travel Time
In two separate shallow field experiments, at two distance scales, we have used continuous monitoring to estimate the effect of barometric pressure on crosswell travel time and thereby calibrated the stress sensitivity of the rock volume between the wells. In a 3 m experiment we found a stress sensitivity of 10/Pa while in a 30 m experiment the sensitivity was 5 x 10 /Pa. Results from a deeper ...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1987
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1987.tb00728.x