Kīlauea, Hawaii, viewed north-NW across Kīlauea Caldera and Halemau...

The Hawaiian Volcano Observatory is the cluster of buildings on rim of caldera just to left of Kulani. In foreground is lava flow of September 1982, the last eruption before the current one began in January 1983. The ledge nearly half way up the wall of Halemaumau is the highest level of the 1967-68 lava lake. Light, slightly yellow patches of discoloration indicate areas of chemical alteration near vents and fumaroles.