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Site following the current activity of Alaska's Redoubt Volcano. If the volcano erupts it will impact the population core of Alaska throughout Southcentral Alaska including the Mat-Su Valley, Anchorage, and the Kenai Peninsula. The Alaska Volcano Observatory offers a number of photos, maps and trajectory graphs as well.

The death of thousands of people following Monday's earthquake in Sichuan, China, has once again called attention to the need for technology that provides better warning of such devastating natural events.

Intense seismic activity in Yellowstone National Park in the last two weeks has led to speculation that a cataclysmic eruption is imminent.

Submitted by Ann.