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COURTESY HAWAIIAN VOLCANO OBSERVATORY Kilauea Volcano’s northeast spatter cone at Puu Oo has a 30-foot-wide lava pond that experiences a cyclic rise and fall of the lava surface. The movement is driven by the buildup and release of gas. This photograph taken Friday captured the moment of gas release, which generated vigorous spattering. In the upper left, the plume from Kilauea’s summit lava lake can be seen in front of Mauna Loa, and in the upper right Mauna Kea is visible.