Global Volcanism Program | Image GVP-06047
An incandescent lava flow travels downslope from the vent at the upper right during a September 1984 eruption from Krafla volcano. The eruption initially began on 4 September along an 8.5-km-long fissure; during later stages activity was localized along singular vents such as the one seen in this 15 September photo. A plume of gas is concentrated over the vent, but steam is also seen rising across much of this photograph, from recent lava flows.
Photo by Michael Ryan, 1984 (U.S. Geological Survey).