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Fissure 8 Tephra Cone Changes Shape Through Time
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The U.S. Geological Survey released this animated GIF on Monday, June 25, 2018.
This animated gif shows the fissure 8 tephra (cinder and spatter) cone morphology changes between June 15 and 24, 2018.
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During this time a shoulder grew on the channel side of the cone as the vent shifted from being two distinct fountains to three, then to a single source of voluminous roiling. The cone height is about 154 feet from the hardened lava surface on which it was built.
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