Mount Rainier is America's most dangerous volcano. Scientists warn lahars could devastate 150,000 people with little warning. The post Scientists Warn Threat From America’s Most Dangerous Volcano ...

Inside a thunderstorm, warm air is forced upward in a strong updraft. As the air rises, ice and water particles collide inside the cloud, creating electrical charges. Those collisions build up ...

Who will stop the Rain-ier? Scientists are warning that Washington’s Mount Rainier could unleash a catastrophic mudslide that has the potential to devastate three large towns within minutes. Often ...

Volcanoes are often judged by the size of their eruptions, but volcanologists measure danger ...

After Mount St. Helens erupted in 1980, experts were faced with a precarious question: How can we best prepare for when—not if—the next volcanic eruption in the Cascade Range occurs? Triggered by a ...

SANTIAGO, Chile (AP) - A volcano in the Caulle Cordon of southern Chile erupted for a second day Sunday, shooting out pumice stones and pluming a cloud of ash six miles (10 kilometers) high and three ...

Volcanic lightning looks surreal: an arc of light rises from the volcanic crater, stretching out into the murky skies. Although scientists knew what caused such frightening yet beautiful phenomena, ...

One of the most deadly and dangerous volcano hazards isn’t lava. Mudflows called lahars can come without clear warning. In June 2024, early career geologist Gustavo Béjar López traveled to Guatemala ...