"see" the heat

This picture first looks not very special (maybe you have to look at the large version). Nevertheless I chose it and present it here because you can even "see" to heat coming up from the remaining lava deep below the fracture of the December 2006 eruoption of Mount Etna.

Canon PowerShot G3
Aufnahmedatum/-zeit: 10.12.2006 16:00
Tv (Verschlusszeit): 1/500
Av (Blendenzahl): 4.0
Objektiv: 7.2 - 28.8mm
Brennweite: 28.8mm