1. Natural hazards and risk mitigation in El Salvador: An introduction, William I. Rose, Julian J. Bommer, and Ciro A. Sandoval ? 1 Landslides and Debris Flows, 2. The voluminous Acajutla debris avalanche from Santa Ana volcano, western El Salvador, and comparison with other Central American edifice-failure events, Lee Siebert, Paul Kimberly, and Carlos R. Pullinger ? 3. The Las Colinas landslide, Santa Tecla: A highly destructive flowslide triggered by the January 13, 2001, El Salvador earthquake, Stephen G. Evans and Allison L. Bent ? 4. Las Colinas landslide: Rapid and long-traveling soil flow caused by the January 13, 2001, El Salvador earthquake, Kazuo Konagai, Jorgen Johansson, Paola Mayorca, Ryosuke Uzuoka, Tetsuro Yamamoto, Masakatsu Miyajima, Nelson Pulido, Kyoji Sassa, Hiroshi Fukuoka, and Freddy Duran ? 5. Geologic and engineering characterization of Tierra Blanca pyroclastic ash deposits ? Reinaldo Rolo, Julian J. Bommer, Bruce F. Houghton, James W. Vallance, Panagiotis Berdousis, Christina Mavrommati, and William Murphy ? 6. Landslides triggered by the 13 January and 13 February 2001 earthquakes in El Salvador, Randall W. Jibson, Anthony J. Crone, Edwin L. Harp, Rex L. Baum, Jon J. Major, Carlos R. Pullinger, C. Demetrio Escobar, Mauricio Martínez, and Mark E. Smith ? 7. Debris-flow hazards at San Salvador, San Vicente, and San Miguel volcanoes, El Salvador, Jon J. Major, Steven P. Schilling, Carlos R. Pullinger, and C. Demetrio Escobar ? Volcanic Hazards, 8. Apocalypse then: Social science approaches to volcanism, people, and cultures in the Zapotitán Valley, El Salvador, Payson Sheets ? 9. The acid volcanic lake of Santa Ana Volcano, El Salvador, Alain Bernard, Carlos Demetrio Escobar, Agnès Mazot, and Ruben Eduardo Gutiérrez ? 10. Spatial and temporal variations of diffuse CO2 degassing at Santa Ana–Izalco–Coatepeque volcanic complex, El Salvador, Central America, José M.L. Salazar, Pedro A. Hernández, Nemesio M. Pérez, Rodolfo Olmos, Francisco Barahona, Rafael Cartagena, Tomás Soriano, Dina L. López, Hirochika Sumino, and Kenji Notsu ? 11. Eruptive history and volcanic hazards of Volcán San Salvador Darrell Sofield ? 12. Subaqueous intracaldera volcanism, Ilopango Caldera, El Salvador, Central America, Crystal P. Mann, John Stix, James W. Vallance, and Mathieu Richer ? 13. Mafic magma injection triggers eruption at Ilopango Caldera, El Salvador, Central America, Mathieu Richer, Crystal P. Mann, and John Stix ? 14. Dynamics of diffuse degassing at Ilopango Caldera, El Salvador, Dina L. López, Loretta Ransom, Nemesio M. Pérez, Pedro A. Hernández, and Jeannette Monterrosa ? 15. Diffuse soil degassing of carbon dioxide, radon, and mercury at San Miguel volcano, El Salvador, Rafael Cartagena, Rodolfo Olmos, Dina L. López, Tomás Soriano, Francisco Barahona, Pedro A. Hernández, and Nemesio M. Pérez ? 16. Physical and chemical evolution of San Miguel volcano, El Salvador, Craig A. Chesner, Carlos R. Pullinger, and C. Demetrio Escobar ? 17. Diffuse CO2 and 222Rn degassing from San Salvador volcano, El Salvador, Central America, Nemesio M. Pérez, José M.L. Salazar, Pedro A. Hernández, Tomás Soriano, Dina L. López, and Kenji Notsu