Recent commercial satellite imagery shows that during the last several months no significant alterations have taken place at the Parchin military site. At least one building at this site is alleged to have been the location of high explosive tests related to the development of nuclear weapons prior to 2004. A November 27, 2013 image shows that the areas that had previously been asphalted remain unchanged compared to an image from August 13, 2013. A central area remains unpaved. In sum, no significant changes could be found at the site in the November image. We cannot see what is happening inside the buildings but the image does not show any activity associated with large-scale alterations inside the buildings.
Since February 2012, ISIS has monitored developments at the Parchin complex using commercial satellite imagery to catalog changes at the site. The imagery shows that between early 2012 and the summer of 2013 Iran sanitized, demolished portions of, and reconstructed the site in an apparent effort to hide past activities and undermine the International Atomic Energy Agency's (IAEA's) ability to conduct verification activities.
See full text at the Institute for Science and International Security: No Significant Changes Visible at Parchin Nuclear Site