Correcting near-surface velocity and elevation variations with statics is an essential step in land seismic data-processing sequences. In marine seismic processing, static corrections for water-velocity variations or tidal variations are often required, and, occasionally, we can even correct for near-surface velocity variations. Ten years ago, recognizing the importance of static corrections in seismic processing, SEG published Static Corrections for Seismic Reflections Surveys by Mike Cox. This book is an invaluable reference to anyone trying to solve or understand a difficult statics problem. In an afterword to this introduction, Cox has kindly contributed his thoughts and observations on static corrections in the intervening decade.