Tyrrhena Patera Mosaic (Released 15 October 2004)

This image of Tyrrhena Patera is a mosaic of daytime thermal infrared images colorized with a mosaic of nighttime temperature images (purple/blue is coldest, yellow/red is warmest).<p>The colder nighttime temperatures (blue hues) in the caldera and on the flanks of the volcano indicate that this area is likely covered with finer-grained materals. This contrasts strongly against the warm (red) area to the northwest. These warmer temperatures indicate a rockier surface, possibly even exposed bedrock. This is especially probably where the red hues conform with the topography.<p>A <a href=&quot;/mosaics/tyrrhena/&quot;>Flash-based viewer</a> is available for this image.