  The surface of Europa is geologically young and shows signs of current
activity. Studying it from a photometric point of view gives us insight on its
physical state. We used a collection of 57 images from Voyager's Imaging
Science System and New Horizons' LOng Range Reconnaissance Imager for which we
corrected the geometric metadata and projected every pixel to compute
photometric information (reflectance and geometry of observation). We studied
20 areas scattered across the surface of Europa and estimated their photometric
behavior using the Hapke radiative transfer model and a Bayesian framework in
order to estimate their microphysical state. We have found that most of them
were consistent with the bright backscattering behavior of Europa, already
observed at a global scale, indicating the presence of grains maturated by
space weathering. However, we have identified very bright areas showing a
narrow forward scattering possibly indicating the presence of fresh deposits
that could be attributed to recent cryovolcanism or jets. Overall, we showed
that the photometry of Europa's surface is more diverse than previously thought
and so is its microphysical state.
