It's the seventh eruption since just before Christmas at one of the world's most active volcanoes, with lava shooting hundreds of metres into the sky. Take a look at these incredible pictures of ...

Radiocarbon dating of tephra, or volcanic ash, deposits on Simushir Island placed them within the past 300 years. What’s more, analysis of the caldera’s volume and sulfur isotopes suggested ...

Experts have identified ashy layers at multiple Bolivian sites as tephra, a material produced by volcanic eruptions, that rained down on settlements near Lake Titicaca sometime between 400CE and ...

Gas emissions and rock fragments ejected from the volcano into the air, known as tephra, were the primary hazards from the eruption, the observatory said. A few hours later, another observatory ...

The team analyzed volcanic ash, known as tephra, found trapped in Arctic ice cores taken from Greenland and Russia to link the period of unexplained extreme climate in the Mediterranean with the ...

Tephra is a general term for fragments of volcanic rock and lava that are blasted into the air by explosions or carried upward by hot gases. Tephra includes large, dense chunks, light rock debris ...

Above the havoc, a cloud of volcanic steam and ash rose 30,000 feet. Eruptions of steam, ash, and tephra continued until June 1917, when the volcano resumed its quiet profile, with minor steam ...