Dedication • Part I: Introduction and Active Tectonic Setting • Introduction, Paul Mann • 1. GPS results from Puerto Rico and the Virgin Islands: Constraints on tectonic setting and rates of active faulting, Pamela E. Jansma and Glen S. Mattioli • 2. Neotectonics and subsidence of the northern Puerto Rico–Virgin Islands margin in response to the oblique subduction of high-standing ridges, Nancy R. Grindlay, Paul Mann, James F. Dolan, and Jean-Paul van Gestel • Part II: Studies of Instrumental and Historical Seismicity • 3. Ground-motion relations for Puerto Rico, Dariush Motazedian and Gail Atkinson • 4. Microseismic activity reveals two stress regimes in southwestern Puerto Rico, Victor Huérfano, Christa von Hillebrandt-Andrade, and Gisela Báez-Sanchez • 5. Historical earthquakes of the Puerto Rico–Virgin Islands region (1915–1963), Diane I. Doser, Christina M. Rodriguez, and Claudia Flores • Part III: Identification of Late Quaternary Faults in Puerto Rico and Shallow Coastal Areas • 6. Reconnaissance study of Late Quaternary faulting along Cerro Goden fault zone, western Puerto Rico, Paul Mann, Carol S. Prentice, Jean-Claude Hippolyte, Nancy R. Grindlay, Lewis J. Abrams, and Daniel Laó-Dávila • 7. Toward an integrated understanding of Holocene fault activity in western Puerto Rico: Constraints from high-resolution seismic and sidescan sonar data, Nancy R. Grindlay, Lewis J. Abrams, Luke Del Greco, and Paul Mann • 8. Geologic evidence for the prolongation of active normal faults of the Mona rift into northwestern Puerto Rico, Jean-Claude Hippolyte, Paul Mann, and Nancy R. Grindlay • 9. Neotectonics of southern Puerto Rico and its offshore margin, Paul Mann, Jean-Claude Hippolyte, Nancy R. Grindlay, and Lewis J. Abrams • 10. Paleoseismic study of the South Lajas fault: First documentation of an onshore Holocene fault in Puerto Rico, Carol S. Prentice and Paul Mann • Part IV: Studies of Seismic Sources, Ground Amplification, and Paleoliquefaction • 11. A seismic source model for Puerto Rico, for use in probabilistic ground motion hazard analyses, Roland C. LaForge and William R. McCann • 12. Liquefaction susceptibility zonation map of San Juan, Puerto Rico, James V. Hengesh and Jeffrey L. Bachhuber • 13. Liquefaction induced by historic and prehistoric earthquakes in western Puerto Rico, Martitia P. Tuttle, Kathleen Dyer-Williams, Eugene S. Schweig, Carol S. Prentice, Juan Carlos Moya, and Kathleen B. Tucker • 14. Earthquake-induced liquefaction potential in western Puerto Rico using GIS technology, Emir José Macari and Laureano R. Hoyos • Index