Lahar detection system upgraded for Mount Rainier

In the shadow of Washington State's Mount Rainier, about 90,000 people live in the path of a potential large lahar—a destructive, fluid and fast-moving debris flow associated with volcanic slopes.

Nepal court orders limit on Everest climbing permits

Nepal's Supreme Court has ordered the government to limit the number of mountaineering permits issued for Everest and other peaks, a lawyer confirmed Friday, just as expeditions prepare for the spring climbing season.

How mantle movements shape Earth's surface

The movement of tectonic plates shapes the rocky features of Earth's surface. Plates' convergence can form mountain ranges or ocean trenches, and their divergence can form oceanic ridges. But it's not just the plates themselves ...

Flood-hit Kenya and Tanzania on alert as cyclone nears

Kenya and Tanzania were on alert on Saturday for a cyclone heading towards their Indian Ocean coastlines, threatening to pile on more misery after deadly floods that have ravaged the region.

Demystifying the complex nature of Arctic clouds

With dancing ribbons of light visible in the sky, a team of researchers flew on a series of scenic and sometimes stormy flights into the cold unknown, trying to learn more about why one of the most frigid places on Earth ...

Lake tsunamis pose significant threat under warming climate

Cowee Creek, Brabazon Range, Upper Pederson Lagoon—they mark the sites of recent lake tsunamis, a phenomenon that is increasingly common in Alaska, British Columbia and other regions with mountain glaciers.

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