The restless lava lake in Nyiragongo's summit crater regularly causes eruptions of gas and smoke laden with tephra. Lava is the ... to wash. The type of lava erupted by Nyiragongo and many ...

Eruptions of steam, ash, and tephra continued until June 1917 ... try Lassen Peak. Four types of volcanoes—shield, composite, cinder cone, and plug dome—can be found in Lassen Volcanic ...

The ongoing eruption is occurring within Halema‘uma‘u, with lava flows contained in the summit caldera. Trade winds transport tephra and gas emissions to the southwest, away from the closest ...

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 ...

A phreatic eruption is a “steam-driven explosion that occurs when water beneath the ground or on the surface is heated by magma, lava, hot rocks, or new volcanic deposits (for example ...