A close up of a brown portion of the water surface, on the north margin of K&#29

A close up of a brown portion of the water surface, on the north margin of Kīlauea's summit pond, showing the sharp color boundaries that can occur. Wind at the bottom of Halema‘uma‘u Crater produces the ripples seen here, and also causes rapid shifting of the steaming on the water surface. USGS photo by M. Patrick.