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Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F). The volcanic rock resulting from subsequent cooling is also often called lava. A lava flow is an outpouring of lava during an effusive eruption.
Augustine Volcano (Alaska) during its eruptive phase on January 24, 2006. A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
Unusually hot (>950 °C; >1,740 °F) rhyolite lavas, however, ... Magma that is extruded onto the surface during a volcanic eruption is called lava. Lava cools and ...
NORTH OF SYLINGARFELL, Iceland (Reuters) -A volcano in southwestern Iceland erupted on Thursday for the third time since December, spraying streams of lava up to 80 metres (260 feet) into the air ...
Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 2018. A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) [1] is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of 100 km/h (30 m/s; 60 mph) but is capable of reaching speeds up to ...
Mount Ruang spewed lava and and ash on April 17, seen from Sitaro, North Sulawesi. It also triggered lightning in the ash cloud -- a common phenomenon in powerful volcano eruptions.
A volcano in southwestern Iceland has erupted for the sixth time since December, spewing bright orange lava plumes high into the air.. The eruption began at 9.26pm local time on the Reykjanes ...
Two of those areas are associated with lava flows aged 174,000–70,000 years ago, and the third is a focus of present-day seismicity. [51] In 2017, NASA conducted a study to determine the feasibility of preventing the volcano from erupting. The results suggested that cooling the magma chamber by 35 percent would be enough to forestall such an ...