ASTER night time TIR and SWIR thermal images were acquired at 0910 UTC on July 25, 2007. The linked image shows the warmest ASTER TIR and SWIR pixels over a shaded relief image of a SRTM DEM. The 90m ASTER TIR pixels show pixel integrated normalized emissivity temperatures ranging from about 9C on the upper flanks (800m west of the summit) to a max of 44C in the center of the summit crater. The 30m SWIR pixels show temperatures ranging from 241C on the crater rim to 359C at the center of the summit. While the max SWIR temps are similar to the ASTER temps measured when the first small lava dome appeared at Augustine in Feb 2006, the TIR temps are much lower, suggesting that the hottest areas are quite small.

Date:	July 25, 2007 9:10 AM
Volcano(es):	Cleveland
Photographer/Creator:	Wessels, Rick
URL:	http://www.avo.alaska.edu/images/image.php?id=13326