This special section on solid-earth seismology consists of papers about studies associated with IRIS, the Incorporated Research Institutions for Seismology. This is not an arbitrary choice; the recent advances made by IRIS groups have begun to have an impact on exploration seismology—particularly in passive seismic imaging, imaging of converted transmissions, and velocity analysis of long-offset diving waves. Nevertheless, we feel the impact would be larger if more explorationists were aware of these advances.

Many geophysicists find that their careers and education are dynamic rather than static. Most of us obtained our education in a solid-earth type of geology department and...

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