Cleveland Volcano overflight, August 4, 2015. View of lava dome within Cleveland's summit crater, showing concentric rings and radial fractures in dome surface, surrounding elevated, hot dome core. Photo taken during the 2015 field season of the Islands of Four Mountains multidisciplinary project, work funded by the National Science Foundation, the USGS/AVO, and the Keck Geology Consortium.
Image courtesy of AVO/USGS.
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