Magnetic prospecting is one of the oldest geophysical surveys. It has a long history from the application of the mining compass of Agricola to the magnetic measurements from satellites. The interpretation procedures of magnetic measurements have changed signifi cantly from the graphical methods to computer based interpretation. The main aim of this textbook is the detailed summary and discussion of the contemporary procedures which are presently applied in the magnetic interpretation. The subject of this book, the reduction and analysis of magnetic survey has been developed in the lectures presented to the students majoring in geophysics at the Eötvös Loránd University. The present book consists of three parts: Fundamentals of the magnetic methods, Mathematical tools of interpretation, and Interpretation of magnetic anomalies. Some mathematical details are summarized in the appendices. The discussed methods are illustrated by model calculations and fi eld examples. ABOUT THE AUTHOR Károly I. Kis is Associate Professor of Geophysics (Eötvös Loránd University, Budapest). He is the author of six university lecture notes on gravity and magnetic prospecting, he has written two textbooks and 64 articles on the subject.