Before you begin:
Find Books
Databases
On the Web
U.S. Geological Survey
Includes a great deal of information in the "Hazards" section
U.S. General Services Administration - Architecture & Engineering Portal
Includes a section on Seismic/Structural Engineering with many links to helpful resources (codes, standards, maps, etc.)
Earthquake Engineering Research University of California, Berkeley
MCEER - a national center of excellence dedicated to the discovery and development of new knowledge, tools and technologies that equip communities to become more disaster resilient