PUERTO VARAS, Chile — “Well, this sounds fun,” I thought as I leafed through the list of activities offered by my hotel. What caught my eye was a hike on a dormant volcano. I had visions of a ...

One of the most explosive volcanoes in U.S. history began its eruption with a trickle, not a blast. Mount St. Helens' gas-laden magma oozed into the cone before the mountain finally erupted in 1980.

Volcanoes have been capturing global attention this summer, rumbling back to life across continents and reminding us of the raw power beneath our feet. In Indonesia, Mount Lewotobi Laki Laki covered ...