Natural hazards and disasters -- Plate tectonics and physical hazards -- Earthquakes and their causes -- Earthquake prediction and mitigation -- Tsunami -- Volcanoes: tectonic environments and eruptions -- Volcanoes: hazards and mitigation -- Landslides and other downslope movements -- Sinkholes, land subsidence, and swelling soils -- Climate change and weather related to hazards -- Streams and flood processes -- Floods and human interactions -- Waves, beaches, and coastal erosion -- Hurricanes and nor'easters -- Thunderstorms and tornadoes -- Wildfires -- Impact of asteroids and comets -- The future: where do we go from here?