A third volcano on the island ... potentially disrupting air travel between North America and Asia, and health problems for communities farther away. Volcanic ash is angular and sharp and has ...

along the west coast of North America, across the Bering Strait, down through Japan and into New Zealand." Its volcanoes also extend further south into Antarctica. "Three out of every four live ...

Visiting a volcano should be on everyone's life list. The Cascade Range exists because the Juan de Fuca plate (and its broken brother, the Explorer Plate) are sliding down underneath North America in ...