View looking up the pathway of the landslide on the south flank of Casita Volcano. The landslide eroded into the volcano's lower flank, incorporating both sediment and water into its growing mass. Because the landslide was wet at the start (from rainfall during the hurricane) and picked up a significant volume of water as it moved downslope, it became diluted by the time it reached the base of the volcano. The landslide transformed into a hyperconcentrated flow (40-80% sediment by weight) before spreading beyond the volcano.