Editor's note: This article is the first of two parts that together form an abbreviated version of the Fall 2004 SEG/AAPG Distinguished Lecture. A PowerPoint presentation of this material is posted on the SEG Web site.

“The winds of change” refer to much more than just anisotropic rocks whose seismic anisotropy provides insight into horizontal permeability anisotropy. The way we view our planet is changing. The planet is now being studied as the interaction of four interlocking systems—the hydro-sphere, the atmosphere, the lithosphere, and the biosphere—as all absorb energy from our sun and change. The planet and all its subsystems,...

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