Full text loading...
-
Towards Full Waveform Ambient Noise Inversion
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017, Jun 2017, Volume 2017, p.1 - 5
Abstract
Summary
We develop a method for the joint inversion of noise correlation functions for the distribution of noise sources and for Earth structure.
The forward problem is free of assumptions required to equate noise correlations with Green functions and allows us to compute inter-station correlations for arbitrary distributions of noise sources in space and time. Using adjoint techniques, we design an iterative inversion scheme for noise sources and Earth structure based on waveform and energy differences as misfit functional. Starting from an initial model from a wave equation traveltime inversion, we recover the target velocity model with high accuracy. A key prerequisite is a good inference of the noise source distribution.
© EAGE Publications BV