On the flanks of Washington State Mount Rainier, a spike in seismic rumbling has revived an old, unsettling question for the Pacific Northwest: what happens when the region’s most dangerous volcano ...

When thinking of the world's most dangerous volcanoes, I am sure you imagine the largest of them. When thinking of something dangerous, I expect it to be large, or at least well-known. However, ...

Add Yahoo as a preferred source to see more of our stories on Google. Washington Post On the slopes of an Oregon volcano, engineers are building the hottest geothermal power plant on Earth. The plant ...

Here’s what you’ll learn when you read this story: Geothermal energy accounts for only 0.4 percent of the U.S.’s energy output, but by using a technique known as “superhot rocks,” that number could ...

In the 1780s, the volcano rumbled to life with such force that it sent high-speed avalanches of hot rock, gas and ash down its slopes. Those flows quickly melted the snow and ice and mixed with the ...

POPOCATÉPETL VOLCANO, Mexico -- In the predawn darkness, a team of scientists climbs the slope of Mexico's Popocatépetl volcano, one of the world's most active and whose eruption could affect millions ...