An eruption of Mount Semeru has left a sand miner with severe burns after he was struck by superheated volcanic material in ...

Lahars are fast-moving volcanic mudflows capable of obliterating entire communities, even without an eruption, when water rapidly mixes with loose rock, ash and debris on a volcano's slopes. Pictured ...

Mount Rainier, deemed the most dangerous volcano in the US, threatens more than 60,000 residents living in its lahar danger zone. Lahars are fast-moving volcanic mudflows capable of obliterating ...