A false-color temperature map indicates hot spots along fissures in the "tiger stripes" on Enceladus' surface. These are the "split ends" of the stripes known as Alexandria Sulcus and Cairo Sulcus.
Alan Boyle writes:Temperature readings from the Cassini orbiter support the view that warmth is welling up through cracks in the icy surface of Enceladus, one of Saturn's most intriguing moons.
The readings were taken by the 6.4-ton spacecraft's infrared spectrometer and high-resolution camera during an August flyby, and discussed today in a series of news releases and advisories. In an e-mailed alert, Cassini imaging team leader Carolyn Porco said a "phenomenal amount of heat is emerging" through the south polar fractures known as tiger stripes.
The hot spots might not sound all that hot: The warmest areas registered surface temperatures of 120 degrees below zero Fahrenheit, or 190 Kelvin. But Porco said that's staggeringly higher than the coldest temperatures in the south polar terrain, which dip as low as 365 degrees below zero F (52 Kelvin). She called particular attention to a warm fissure known as Damascus Sulcus.
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http://cosmiclog.msnbc.msn.com/_news/2010/11/30/5555919-see-whats-hot-on-saturn-moon