Magma bursts from a volcanic eruption at hte Pu'u Huluhulu volcanic vent on Mount Kilauea, Hawaii. For years, Kilauea was thought to be a part of the neighboring volcano of Mauna Loa. Geological tests of the region showed that Kilauea has its own "magma plumbing system," however.

Photograph by James L. Amos, National Geographic

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