Exploration of natural resources is becoming more and more expensive. This means that more scientific approaches are needed using the best techniques available. However, no single technique can cover any of the objectives. Regional approaches, necessary to outline a prospective area, lack the detail required for exploration; detailed methods and techniques lack proper overview. A combination of both types of approaches and several techniques within are required to do optimal exploration. This book provides a number of examples (models) of different approaches and styles from different parts of the world, giving the reader not only new information but also a view of how different countries emphasize their exploration.

This publication summarizes data for earthquakes that occurred in the 50 states and Puerto Rico during 1985. Descriptions of individual earthquakes include hypocenters, magnitudes, intensities, and damages. The report also contains results from regional networks and data recorded by strong-motion seismographs.