Evolution of a blocked channel, photo 1. A blockage of rafted material within the lava channel causes lava to flow over its banks near the Kapoho cone. In this section of the lava channel a cold lava flow from the 1960 eruption forms a barrier on the north side, which initially directed the channel to the southeast. A constriction in the channel formed at the bend where chunks of cooled rafted lava were able to accumulate and block the flow. Photo taken Tuesday, July 3, 2018 courtesy of U.S. Geological Survey