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The word lava comes from Italian and is probably derived from the Latin word labes, which means a fall or slide. [2] [3] An early use of the word in connection with extrusion of magma from below the surface is found in a short account of the 1737 eruption of Vesuvius, written by Francesco Serao, who described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of ...
The term is ultimately a combination of cryo-, from the Ancient Greek κρῠ́ος (krúos, meaning cold or frost), and volcano. [1] [2]: 492 In general, terminology used to describe cryovolcanism is analogous to volcanic terminology: Cryolava and cryomagma are distinguished in a manner similar to lava and magma. Cryomagma refers to the molten ...
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 ...
What had been low-level lava flows since Thursday morning became more vigorous fountaining Friday evening, according to the U.S. Geological Survey’s Hawaii Volcano Observatory.
At least 37 people have been killed, and more than a dozen injured on the Indonesian island of Sumatra after heavy rains triggered flash flooding and a cold lava flow from an active volcano ...
Flash floods and cold lava flow from Mount Marapi in West Sumatra province in May killed more than 60 people. (Reporting by Ananda Teresia; Editing by Michael Perry) Show comments.
Laze plumes forming from pāhoehoe lava flowing into the Pacific Ocean, Hawaii. Laze is acid rain and air pollution arising from steam explosions and large plume clouds containing extremely acidic condensate (mainly hydrochloric acid), which occur when molten lava flows enter cold oceans. [1] [2] The term laze is a portmanteau of lava and haze.
The two main types of lava field structures are defined as sheet flow lava and pillow lava. Sheet flow lava appears like a wrinkled or folded sheet, while pillow lava is bulbous, and often looks like a pile of pillows atop one another. [2] An important aspect of lava flow morphology is a phenomenon known as lava flow inflation. This occurs in ...