This third edition provides a general but comprehensive introduction to the most important methods and techniques of geophysical exploration. These methods represent a primary tool for investigation of the subsurface and are applicable to a very wide range of problems. The book incorporates many suggestions made by users of the second edition and covers all the major advances and developments in exploration geophysics. The text has been revised and updated with several chapters being completely rewritten and a new chapter on ground penetrating radar has been included.