DOGAMI Websites and Publications
The Oregon Department of Geology and Mineral Industries (aka DOGAMI) is the go-to place for geology information in Oregon including information about natural hazards like tsunamis, earthquakes, and volcanos.
The DOGAMI site includes links to a lot of great information including links to original DOGAMI publications like:
USGS Website and Publications
The U.S. Geological Survey, or USGS, provides reliable scientific information about geology, natural disasters, water management, and energy and mineral resources.