Changes in color at Kīlauea's summit water pond are common

This compilation shows the appearance of the water pond at Kīlauea's summit over the past two weeks. Day to day changes in the color of the pond are common, with portions of the pond shifting from a green hue to brown. A sharp color boundary has been common for several months in the same general area of the pond. Water samples collected in January from different color zones show only slight chemistry differences. USGS photos by M. Patrick.