The National Oceanic and Atmospheric Administration (NOAA) is a federal agency focused on the condition of the oceans and the atmosphere. It plays several distinct roles...
Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment.
Tours and expeditions to active volcanoes, walking and study holidays in volcanic areas/ VolcanoDiscovery
Comprehensive source of information about the San Andreas Fault, how to see it, earthquakes, tsunamis, etc.