NASA's Earth Observatory offers photos showing locations of volcanic activity and earthquakes. Click on thumbnails to view large images and read about the causes and effects of these natural hazards.

Features data collection for natural disasters and maps the trends giving us an idea of where disasters have a tendency to strike.

View photographs and maps as well as read a geological article about the volcanic region of Mt. Usu and Mt. Toya near Hokkaido, Japan.

This lesson will provide models or diagrams that explain how volcanic eruptions occur, and discuss their impact on living things. It is 2 of 5 in the series titled "Volcanoes."

Maps and great graphics of Krakatau. Learn about the size and formation of Krakatau. Find out the last time Krakatau erupted. Also, links to recent photos.

An orographic sketch map from 1873 of the Andes mountain chains. The map divides the system into the Andes of Columbia and Ecuador, Andes of Bolivia and Peru, Andes of Chile, and Andes of Patagonia. The map is keyed to show the prominent...

This page has pictures and descriptions of different areas on Earth where the plates are spreading. Also includes links to more information on slow, medium, and fast moving plates.

A world map featuring active volcanoes, plate tectonics, hot spots, and ring of fire.

Information about the land forms of Virginia. Explore each region of the state and read about the ancient shorelines, active volcanoes, colliding continents, and dinosaur fossils.

Interesting information and photos about some of the 25 volcanos that exist in Nicaragua.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

This resource page contains an exhaustive list of pictures and videos of sea floor structures found all over the world.

Photos of Venus' surface and cloud tops. Includes 3-D surface views. Thumbnail images load quickly and link to larger files for more detail.

Labeled diagram of two kinds of volcanoes: effusive and explosive.

Clearly labeled diagram of a volcanic eruption, with a focus on the hazardous effects of landslides, pyroclastic flows, lava flows, eruption clouds, acid rain, tephra, and lahars.

This site gives a comprehensive look at volcanoes. It begins with a basic overview, and then goes in-depth. The site includes an expert's section, words to know, witness accounts, experiments, and how to prepare for a volcanic eruption...

A map from 1904 of the Argentine Republic, Chile, Paraguay, and Uruguay. This map shows capital cities, major towns, ports, rivers, terrain, and coastal features. The map shows mean annual temperatures for selected cities, elevations for...

The erupting Icelandic Volcano has spewed tons of ash into the atmosphere creating havoc for global trade. This article briefly discusses its impact on the environment and the economic consequences. Education resources are included. (20...

A Wikipedia entry on the Mayon Volcano, the most active volcano in the Philippines. Excellent photos and maps. Includes a log of recent eruptions.

This site explaines what a volcano is by looking at the features, types, and the location of volcanoes The site also looks at some case studies for further information.

Mauna Loa means long mountain, and it is the largest and most active volcano on earth. Get some good overall facts regarding this infamous volcano.