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Video showing the main lava stream on the lower east flank of Pu‘u ‘Ō‘ō. This stream carries most of the lava—the rest splits off to the south (to the left) and flows behind the mounds at upper left. The previous video shows the section of the stream visible at upper right. The lava stream here is about 4 m (13 ft) across, 2 m (7 ft) deep, and is moving at speed of about 3 m per second (10 ft per second).