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A volcanic bomb observed at a Hawaiian style spatter rampart near Mt. Bachelor, Oregon. The molten lava originally sailed through the air before pancaking on the ground and oozing downward.
Lava bombs. Eruptions are driven by degassing magma as the pressure releases when it approaches the surface. When they blow, the results include high ash plumes that threaten aircraft engines and pyroclastic flows that flow silently downslope, but they also eject large globs of molten magma. These freeze during their journey through the air and land with force up to several kilometres away. Loz Image credit: Thomas Boyer
Source: facebook.com
Excellent nighttime shot of Fuego volcano
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新しい火山はどこも火星みたいな風景
Though look like pictures from Mars, they’re the surface of a volcano covered with fresh volcanic ejecta.
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Using high-speed, high-definition cameras, researchers have tracked the motion of volcanic projectiles. The projectiles, which can be as small as an apple or as large as a van, can be launched as far as several kilometers from the volcano, causing destruction where they land.
The researchers analyzed the trajectory, rotation, collision, and deformation of the projectiles in-flight in a new study in Reviews of Geophysics. The results will allow scientists to make better predictions of the projectiles’ trajectory and landing impact.
This video show projectiles from the Batu Tara volcano in Indonesia. It shows ascending and descending parts of a block trajectory. On impact with the ground, the block forms an impact crater, then it bounces out of the crater and forms two more impact craters before bouncing on a hard, probably lava, surface and disappearing from the field of view. Other projectiles that fragment on impact with the hard surface can also be seen.
Credit: American Geophysical Union
Close up video of erupting volcano, with lava bombs and ash flying into the air. Not sure I’d be as close as some of those crowds.
Source: instagram.com
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This large specimen is a lava bomb found somewhere in Oregon (or maybe Washington?) this summer by my dad @portwes.
Lava bombs are formed when molten material ejected from a volcanic eruption cools in the air before hitting the ground.
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There are sometimes huge boulders in random places in Hawaii. My geology professor explained that Hawaii is littered with bombs (projectiles ejected from volcanoes during violent eruption).
He appeared on the National Geographic a few times as a University of Hawaii geologist. During one such filming he was explaining bombs during an eruption when one such projectile landed near them. In his classic way, he gestured to it and said “And here one is! Maybe we should move back farther.”
#geology #lifeinparadise #nationalpark #Molokai #Hawaii (at Kalaupapa Lookout, Moloka'i Forest Reserve Pālāʻau State Park)
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Mount Etna, Sicily
Image © Guy Sargent
Sure looks like a lava bomb to me, tossed out of Etna.