Infrared images of Jupiter have been obtained on 5 nights before, duri
ng and shortly after the period of the impacts of the fragments of com
et Shoemaker-Levy 9 (1993e) with the giant planet. Long lived bright s
pots produced by the impacts have been measured and analyzed. By measu
ring the intensity variation of the spots as a function of Jupiter rot
ation we show that these spots ace likely constituted by large and thi
n clouds of dust located above the methane layer. The IR relative albe
dos has been also measured for some of these spots.