The book of famous geophysicists P. Sheriff (USA) and L. Geldart (Canada) is dedicated to the basics of modern exploration seismics. The first volume describes the basics of the seismic method of studying the earth's interior and searching for minerals: historical information, the theory of seismic waves, the geometry of seismic rays, the field methods of reflected and refracted waves. For each chapter, tasks are given for independent solution. The book is distinguished by clarity of presentation, skillful use of practical material and an abundance of illustrations. The second volume describes the processing of seismic data and their interpretation: analysis of seismic wave velocities, digital processing, geological interpretation of data on reflected waves. For each chapter, tasks are given for independent solution. The book is distinguished by clarity of presentation, skillful use of practical material and an abundance of illustrations. For students, teachers and specialists in exploration geophysics, engineering geology, oil workers . Can serve as a tutorial.