Earthquakes and Geological Discover describes how and whv scientists trace seismic activirv and measure the extent and patterns of seismic waves. Through analvsis of numerous earthquakes, both historical a'nd present, eminent seismologist Bruce Bolt illustrates that basic geological lessons are learned in almost even, occurrence of these highly varied events. In addition, Bolt shows how seismographic data are used to mitigate the risk of future earthquakes by incorporating the latest theoretical models, technologies, and techniques (including manmade earthquakes).