Several volcanic "dust devils" were observed this weekend on Mt. Kilauea. The science of volcanic ash vortices or volcano-nados.

Splashes at the surface give an indication of the commotion below. Beneath the waves, a tornado of hundreds of devil rays swirl in a dizzying dance that goes on for hours. "It's amazing to see a ...

In the Mojave Desert, the sun beats down on the ground and makes pockets of low pressure. Cool air rushes into these areas, where it warms and rises, creating vortices that pick up dust. These types ...

A large, whirling dust devil caught one Iowa man's attention in May. Matt Woods was driving down a gravel road in Boone County when he spotted the dirt-filled funnel whipping across a farm field. He ...

An Iowa man captured video this week of a large dust devil that whipped up in the middle of Gowrie. KCCI Chief Meteorologist Jason Sydejko called the dust devil "incredibly defined," as it spun for ...

Add Yahoo as a preferred source to see more of our stories on Google. Several ash vortices in Hawaii were apparent on U.S. Geological Survey webcams this weekend. Molten lava might normally be the ...