GEOLOGY

Detailed explanation-1: -Alaska has 80 percent of all the active volcanoes in the United States and 10 percent of those found in the world.

Detailed explanation-2: -Volcanic eruptions from Cook Inlet volcanoes (Spurr, Redoubt, Iliamna, and Augustine) can have severe impacts, as these volcanoes are nearest to Anchorage, Alaska’s largest population center.

Detailed explanation-3: -Some of Alaska’s most spectacular volcanoes are a snap to view from the highway system near Anchorage, the Kenai Peninsula and the Copper River Basin.

Detailed explanation-4: -"There are about 169 volcanoes in the United States that scientists consider active. Most of these are located in Alaska, where eruptions occur virtually every year. Others are located throughout the west and in Hawaii (see our Volcano Activity Map for their locations).