Volcanic ash is made of tiny crystal and rock fragments that during an eruption can reach as high as the cruising altitude of commercial aircraft, and that's a concern for airlines.
Scientists say they've found a new method to help predict when volcanoes will erupt, based on data crunched from an eruption last year in Hawaii.
Lord Howe Island is part of an underwater volcanic chain much older than first thought, with the possibility of new islands still to form.
To be better prepared for future eruptions there's a need to understand and monitor poorly known volcanoes, even in remote places.
We can't say that Katla in Iceland is 'due' to erupt, no matter what you have read.
New research shows that carbon dioxide in groundwater can affect the aging of volcanic eruptions. The findings could help predict future eruptions.
When magma rises towards the surface gas bubbles start to form. Whether or not they can escape as the magma is rising affects how explosive the eruption will be.
The current eruption of Kilauea on Hawai'is big island can tell us a lot about what is going on beneath the volcano and may provide lessons for future eruptions.
At Kīlauea in Hawai'i, a recent volcanic eruption has created some of the most spectacular sights in nature. But also danger for those around it.
The Kīlauea volcano on Hawai'i's big island is threatening to produce violent and energetic eruptions not seen since 1924.
Fountains of lava from Hawaii's Kilauea volcano are dramatic, but the most deadly impacts of volcanic eruptions are toxic gases and ash and mud flows.
Research suggests a new threat to life on Earth from the meteorite's crash: Via seismic waves, the impact triggered massive undersea eruptions, as big as any ever seen in our planet's history.
A new study has found a way to predict eruptions at Mount Etna within two weeks.
Businesses worth their weight in salt should at least in principle have the capacity to remedy situations that go wrong, as part of their modus operandi.
To the people of Bali, Mt Agung is not just a volcano. The "great mountain" holds spiritual power and reflects cultural and political unrest.
How do scientists predict volcanic eruptions? To do so with accuracy, they need to know the individual volcano and its history very well.
The world watches and waits to see what will happen next at Bali's Mt Agung, an active volcano.
Hundreds of earthquakes a day are being recorded near Mount Agung in Bali as the volcano threatens to erupt for the first time in more than 50 years.
Warnings are being issued to stay clear of an Indonesian volcano following a series of earthquakes.
The clock is ticking.