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Work defining and describing the FEAVO effect

() gives an example of the FEAVO effect on a real 2D dataset and interprets its physical meaning. Claerbout acknowledges the importance of the phenomenon by including a description and an explanation of it in his course notes and in his book, Imaging the Earth's Interior . () use forward modeling to show that FEAVO effects can be due to smooth velocity anomalies deviating by as little as 2% from the background velocity. The anomalies must be large compared to a wavelength but small when compared to the propagation distance. A solid case study () based on two real 3D datasets and on realistic forward modeling shows that not only shallow velocity anomalies can cause FEAVO effects; the sudden termination of a deep (3000m), low velocity layer by a fault can also be a source of focusing that affects the amplitudes more strongly than the traveltimes. This point draws interest: () received a Best Paper award at the SEG Annual Meeting and the idea is reiterated in () and ().
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Next: Attempts to invert FEAVO-affected Up: Previous work Previous: Previous work
Stanford Exploration Project
6/7/2002