Volcanoes Information
Browse all the currently known volcanoes with map locations, times of eruptions and much more!
http://volcanodb.com

Earthquake
Largest known earthquake database with statistics and information about locations, magnitudes, with google earth support, search engine and RSS feeds
http://earthquakedb.com

Tsunami Information
Largest known tsunami database with statistics and information about locations, magnitudes, with google earth support, search engine and RSS feeds
http://tsunami.name