The Weekly Volcanic Activity Report is a cooperative project between the Global Volcanism Program of the Smithsonian's National Museum of Natural History and the US Geological Survey's Volcano Hazards Program. The project provides up-to-date worldwide volcanic activity information. Users can access regional maps as well as a map of volcanoes discussed each week. New eruption information is provided ... Full description.

This web page describes the lahars that swept down the Drift River Valley during the 1989-90 eruption of Redoubt Volcano, Alaska, and the testing of a new experimental detection and warning system designed to track lahars and debris flows and to give warning to people downstream. In this case, an oil-storage facility in the Cook Inlet area was at risk. The seismometers used (acoustic-flow monitors) ... Full description.

This website lists landforms that are due to geologic structures, glaciers, igneous activity, mass movement, running water, groundwater, wind, and waves or currents. Each landform is linked to a topographic map example that has been enlarged. The highlighted feature is indicated for easy identification and understanding. Full description.

These lecture notes provide an introduction to igneous rocks. The notes cover information about characteristics of magmas, plutonic rocks, volcanic rocks, and textures of igneous rocks. There are several illustrations within the text. This resource is part of the Teaching Petrology collection. http://serc.carleton.edu/NAGTWorkshops/petrology03/index.html Full description.

This on-line PDF document is about Lassen Peak, the southernmost active volcano in the Cascade Range. Discussion is on the 1914-1917 series of eruptions that were the last to occur in the Cascades before the 1980 eruption of Mount Saint Helens, Washington. Included is a generalized map of deposits from Lassen Peak's May 1915 eruptions. Full description.

These lecture notes from a class on natural disasters discuss the characteristics of magma, how magmas form in the Earth, and types of volcanic eruptions. Full description.

This section of VolcanoWorld contains details about the Mt. St. Helens volcanic eruption of 1980. Photos, personal accounts, and scientific information provide a look at before, during, and after the 1980 eruption. There is a section covering the eruptive history of the mountain, as well as the ongoing effects of the 1980 blast on the people, landscape, and wildlife of the area. A description of the ... Full description.

Glacier Peak in north-central Washington state is not prominently visible from any major metropolitan centers, and so its attractions, as well as its hazards, tend to be overlooked. Yet, Glacier Peak has produced larger and more explosive eruptions than any other Washington volcano except Mount St. Helens. In the past 14,000 years, Glacier Peak has erupted at least a dozen times, most recently around ... Full description.

At this site, different kinds of eruptions are compared with Hawaiian eruptions. Students will learn that volcanoes can erupt from vents on their summits or flanks, eruptions interact with water in submarine environments as new islands form beneath glaciers and in crater lakes, and volcanic eruptions can be classified by the character of the eruption, including the following types: basaltic flood, ... Full description.

This resource provides a collection of links to photos and information about volcanoes. Links are divided into the following categories: volcano classifications, types of eruptions, volcanic deposits, scales of impact, and volcanic hazards. Full description.