This comparison of a photograph with a corresponding thermal image ...
Detailed Description
This comparison of a photograph with a corresponding thermal image shows a typical lobe of pāhoehoe on the June 27th lava flow. The highest surface temperatures in this image are just under 900 Celsius (1650 F), but if one measured the temperature of the lava beneath the thin crust it would be close to 1140 Celsius (2080 F).