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

it's the caldera of a volcano which last erupted centuries ago, although it is still spitting and popping. “Go here and walk on what sounds like the hollow surface above a volcanic cauldron.

They took place in the southwest area of the Las Cañadas caldera, at depths ranging ... a shark — now I'm trying to save them ...

The caldera lies 2,600 meters (8,530 feet) above the ground in Mono County. It comprises volcanic rocks, from the rhyolite to the basalts, and was most volcanically active 16,000 to 17,000 years ago.

But some of the other Canary island s are head-and-shoulders with Tenerife ... where you can explore volcanoes such as the Montañas del Fuego and the Caldera Blanca crater, and on Gran Canaria ...

A recent study suggests that the short axis of an elliptical caldera associated with a mud volcano in northern Italy is aligned along the direction of maximum compressive stress. Marco Bonini from ...