US Geological Survey
Usgs: Landslide Hazards Program
Discusses the problems associated with landslides, where they occur, and why they occur.
PBS
Wnet: Thirteen: Savage Earth: Waves of Destruction: Tsunami
This series of three articles (links) give basic information, describe the different causes of tsunamis, warning systems, past tsunamis and the evidence and destruction left by these waves. Animations are provided that illustrate...
Incorporated Research Institutions for Seismology
Iris: Seismic Monitor
Seismic Monitor allows you to monitor global earthquakes in near real-time, visit seismic stations around the world, and search the web for earthquake or region-related information.
Center for Educational Technologies
Center for Educational Technologies: Exploring the Environment: Volcanoes
Learn about volcanoes and apply what you know to making decisions about how to handle real world situations. You will find lots of supporting materials for these activities.
PBS
Nova: Hunt for the Supertwister
This activity will introduce you to the Fujita scale for rating tornado strength. You will then put your knowledge to use by observing photographs of tornado damage and assigning them a rating.
US Geological Survey
U.s. Geological Survey: Earthquakes
This resource provides information about earthquakes, including how they are measured.
Concord Consortium
Concord Consortium: Seismic Explorer
Explore the pattern of earthquakes on Earth, including magnitude, depth, location, and frequency.
Space.com
Space.com: Cracking the Code of Pre Earthquake Signals
Earthquakes can often hit unexpectedly. This article reveals some of the intricacies of these natural disasters and what signs serve as indicators to alert seismologists.
Ready
Ready: Earthquakes
This resource explains what an earthquake is, as well as what you should do to protect yourself in case of an earthquake. It contains several factsheets of information.
University of Wisconsin
The Why Files: Twister: The Tornado Story
The Why? Files, provided by the University of Wisconsin provides a discussion of tornadoes and the environmental conditions that generate them. Includes some great pictures of the formations of the whirlwinds. Also includes a link to a...
PBS
Wnet: Thirteen: Savage Earth: The Restless Planet Earthquakes
Discussion of liquefaction and landslides which are two of the many effects of earthquakes.
US Geological Survey
U.s. Geological Survey: What Causes Earthquakes?
USGS provides the definition of a fault, the basics of earthquakes, the theory of plate tectonics, location of plates and earthquakes, and embedded links to related material.