This volume, derived from the 1999 International Tsunami Symposium, presents a view of the state of tsunami research at the end of the 20th century. It displays progress both in data recovery and reconstructions of historical tsunamis and in detailed examination of disasters. It shows the tsunami community using both traditional methods of data gathering - searching archives and attempting to simulate past events - and integrating modern technologies - side-scan sonar, GPS, global communications, supercomputers - in the quest to understand tsunamis and improve mankind's ability to mitigate the disastrous consequences of these unpredictable and unstoppable events. It chronicles recent advances in mitigation efforts while illuminating the continuing need for increased efforts. The papers range from descriptive texts for the non-specialists to highly technical for those familiar with tsunami research. Audience: This book will be of interest to researchers and graduate students involved in natural hazards research, physical oceanography, seismology, environmental impact assessment and risk assessment.