A 2022 satellite photo shows smoke rising from a caldera on Tofua, highlighting the "looming threat" of the volcanic island.

centered on the volcano. A powerfully spreading umbrella cloud means that ash dispersal is much less affected by atmospheric ...

Volcanic debris “poured across the land ... They still can’t agree on the day Vesuvius blew its top, the height of the umbrella-shaped cloud or the length and the aggression of the blasts.

While they may not send an umbrella cloud of ash across the U.S., such ... In the event of a volcanic eruption, scientists would be able to detect key warning signs well in advance.

The ash cloud produced by the eruption of a sub-glacial volcano in Iceland brought chaos to the European air industry between 14 and 21 April. Since then, disruption to flights has continued ...

This story appears in the September 2007 issue of National Geographic magazine. When the first thunderous boom echoed across the plain of Campania, quickly followed by a blistering hail of ...

An eruption by Indonesia’s Mount Lewotobi Laki-Laki volcano, located in the southeastern part of Flores Island, spewed ash clouds more than 8km (5 miles) into the air, disrupting flights and ...

like the funnel cloud," Malis said. The U.S. Geological Survey describes lavanado as a wind vortex within the caldera, a large depression formed by the collapse of a volcano's central part after ...

Guatemala's Volcano of Fire erupted overnight, prompting authorities to evacuate nearly 300 families and issue warnings for an additional 30,000 people at risk. There have been no immediate ...