Fresh impact crater on Ulysses Patera near 27.3°N, 91.8°W.  . The 
image, MOC S16-01140, was obtained on 13 March 2006 by Mars Global Surveyor.Another image taken before by THEMIS without the crater  constrain the timing of the impact between 18 April 2003 and 7 February 2004. The crater has a diameter of 19.8 ± 3.0 m
NASA/JPL/Malin Space Science Systems
<a rel="nofollow" class="external free" href="http://photojournal.jpl.nasa.gov/catalog/PIA09023">http://photojournal.jpl.nasa.gov/catalog/PIA09023</a>